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C 4/36-MC4

Original operating instructions

Information about the operating instructions

About these operating instructions

  • Read these operating instructions before the product is used or operated for the first time. This is a prerequisite for safe, trouble-free handling and use of the product.
  • Observe the safety instructions and warnings in these operating instructions and on the product.
  • Always keep the operating instructions with the product and make sure that the product is accompanied by these operating instructions only, when the product is given to other persons.

Explanation of symbols used


Warnings alert persons to hazards that occur when handling or using the product. The following signal words are used:
  • Draws attention to imminent danger that will lead to serious personal injury or fatality.
  • Draws attention to a potential threat of danger that can lead to serious injury or fatality.
  • Draws attention to a potentially dangerous situation that could lead to personal injury or damage to the equipment or other property.

Symbols in the documentation

The following symbols are used in this document:
Image alternative Read the operating instructions before use.
Image alternative Instructions for use and other useful information
Image alternative Dealing with recyclable materials
Image alternative Do not dispose of electric equipment and batteries as household waste

Symbols in the illustrations

The following symbols are used in illustrations:
Image alternative These numbers refer to the corresponding illustrations found at the beginning of these operating instructions
Image alternative The numbering reflects the sequence of operations shown in the illustrations and may deviate from the steps described in the text
Image alternative Item reference numbers are used in the overview illustrations and refer to the numbers used in the product overview section
Image alternative This symbol is intended to draw special attention to certain points when handling the product.

Product-dependent symbols

Symbols on the product

The following symbols are used:
Image alternative For indoor use only
Image alternative Double insulated

Product information

Image alternative products are designed for professional users and only trained, authorized personnel are permitted to operate, service and maintain the products. This personnel must be specifically informed about the possible hazards. The product and its ancillary equipment can present hazards if used incorrectly by untrained personnel or if used not in accordance with the intended use.
The type designation and serial number are printed on the rating plate.
  • Write down the serial number in the table below. You will be required to state the product details when contacting Hilti Service or your local Hilti organization to inquire about the product.
    Product information
    Multi-bay charger
    Serial no.

Declaration of conformity

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We declare, on our sole responsibility, that the product described here complies with the applicable directives and standards. A copy of the declaration of conformity can be found at the end of this documentation.
The technical documentation is filed here:
Hilti Entwicklungsgesellschaft mbH | Tool Certification | Hiltistrasse 6 | 86916 Kaufering, Germany


General power tool safety warnings

Image alternative WARNING
Read all safety warnings and all instructions. Failure to follow the warnings and instructions may result in electric shock, fire and/or serious injury.
Save all warnings and instructions for future reference.
Work area safety
  • Keep work area clean and well lit. Cluttered or dark areas invite accidents.
  • Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases or dust. Power tools create sparks which may ignite the dust or fumes.
  • Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.
Electrical safety
  • Power tool plugs must match the outlet. Never modify the plug in any way. Do not use any adapter plugs with earthed (grounded) power tools. Unmodified plugs and matching outlets will reduce risk of electric shock.
  • Avoid body contact with earthed or grounded surfaces, such as pipes, radiators, ranges and refrigerators. There is an increased risk of electric shock if your body is earthed or grounded.
  • Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock.
  • Do not abuse the cord. Never use the cord for carrying, pulling or unplugging the power tool. Keep cord away from heat, oil, sharp edges or moving parts. Damaged or entangled cords increase the risk of electric shock.
  • When operating a power tool outdoors, use an extension cord suitable for outdoor use. Use of a cord suitable for outdoor use reduces the risk of electric shock.
  • If operating a power tool in a damp location is unavoidable, use a residual current device (RCD) protected supply. Use of an RCD reduces the risk of electric shock.
Personal safety
  • Stay alert, watch what you are doing and use common sense when operating a power tool. Do not use a power tool while you are tired or under the influence of drugs, alcohol or medication. A moment of inattention while operating power tools may result in serious personal injury.
  • Use personal protective equipment. Always wear eye protection. Protective equipment such as dust mask, non-skid safety shoes, hard hat, or hearing protection used for appropriate conditions will reduce personal injuries.
  • Prevent unintentional starting. Ensure the switch is in the off‐position before connecting to power source, picking up or carrying the tool. Carrying power tools with your finger on the switch or energising power tools that have the switch on invites accidents.
  • Remove any adjusting key or wrench before turning the power tool on. A wrench or a key left attached to a rotating part of the power tool may result in personal injury.
  • Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in unexpected situations.
  • Dress properly. Do not wear loose clothing or jewellery. Keep your hair, clothing and gloves away from moving parts. Loose clothes, jewellery or long hair can be caught in moving parts.
  • If devices are provided for the connection of dust extraction and collection facilities, ensure these are connected and properly used. Use of dust collection can reduce dust-related hazards.
Power tool use and care
  • Do not force the power tool. Use the correct power tool for your application. The correct power tool will do the job better and safer at the rate for which it was designed.
  • Do not use the power tool if the switch does not turn it on and off. Any power tool that cannot be controlled with the switch is dangerous and must be repaired.
  • Disconnect the plug from the power source from the power tool before making any adjustments, changing accessories, or storing power tools. Such preventive safety measures reduce the risk of starting the power tool accidentally.
  • Store idle power tools out of the reach of children and do not allow persons unfamiliar with the power tool or these instructions to operate the power tool. Power tools are dangerous in the hands of untrained users.
  • Maintain power tools. Check for misalignment or binding of moving parts, breakage of parts and any other condition that may affect the power tool’s operation. If damaged, have the power tool repaired before use. Many accidents are caused by poorly maintained power tools.
  • Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting edges are less likely to bind and are easier to control.
  • Use the power tool, accessories and tool bits etc. in accordance with these instructions, taking into account the working conditions and the work to be performed. Use of the power tool for operations different from those intended could result in a hazardous situation.
  • Have your power tool serviced by a qualified repair person using only identical replacement parts. This will ensure that the safety of the power tool is maintained.

Battery charger use and care

  • To avoid injury, use the charger only to charge Hilti Li-ion batteries approved for use with this charger.
  • The location at which the charger is used should be clean, cool, dry and protected from frost.
  • The charger must be able to emit heat while in operation. The air vents must therefore remain unobstructed. Do not operate the charger inside a closed container.
  • Maintain the product carefully. Make sure that no parts are broken or damaged in such a way that the product no longer functions correctly. If parts are damaged or broken, have the product repaired prior to further use.
  • Use chargers and the corresponding batteries in accordance with these instructions and as is specified for this particular model. Use of chargers for applications different from those intended could result in hazardous situations.
  • Recharge the batteries only with the chargers specified by the manufacturer. A charger that is suitable for a certain type of battery may present a risk of fire when used with other types of battery.
  • When not in use, keep the battery and the charger away from paper clips, coins, keys, nails, screws or other small metal objects that could cause a short circuit at the battery terminals or the charging contacts. A short circuit between the battery terminals or charging contacts may cause injuries (burns) and result in fire.
  • Do not store the battery on the charger. Always remove the battery from the charger when the charging operation has completed.

Careful handling and use of batteries

  • Observe the special guidelines applicable to the transport, storage and use of lithium-ion batteries.
  • Do not expose batteries to high temperatures, direct sunlight or fire.
  • Do not disassemble, crush or incinerate batteries and do not subject them to temperatures over 80 °C (176 °F).
  • Do not use or charge batteries that have suffered mechanical impact, have been dropped from a height or show signs of damage. In this case, always contact your Hilti  Service .
  • If the battery is too hot to touch it may be defective. Put the battery in a place where it is clearly visible and where there is no risk of fire, at an adequate distance from flammable materials. Allow the battery to cool down. If it is still too hot to touch after an hour, the battery is faulty. Contact Hilti Service .


Overview of the product

Image alternative
  1. Release button with additional function (state-of-charge display activation)
  2. Battery
  3. Battery state-of-charge LEDs
  4. Supply voltage LED
  5. State-of-charge LED
  6. Battery temperature LED
  7. Battery interface 1

Intended use

Image alternative

The product described is a battery charger for Hilti Li-ion batteries with a rated voltage of 7.2 to 36 volts. It is designed to be connected to power outlets providing an AC voltage (alternating current) of 100 to 240 V (depending on country-specific version).

A list of the batteries approved for use with this product can be found at the end of this document.

Information displayed

Information displayed by the charger and battery

The supply voltage LED lights when the charger is plugged in and ready for operation.
Battery charge state LEDs
Charge status LED
Battery temperature LED

No battery is inserted.
Battery is inserted and ready to charge.
LEDs 1 to 4 blink first and then light to indicate the battery’s state of charge.
The battery is charging.
The battery is fully charged.
Battery temperature is outside the permitted range (too hot, too cold).
Battery malfunction, charger malfunction.

Li-ion battery charge state display

Image alternative
3 LEDs light, 1 LED blinks.
Charge state: 75 % to 100 %
2 LEDs light, 1 LED blinks.
Charge state: 50 % to 75 %
1 LED lights, 1 LED blinks.
Charge state: 25 % to 50 %
1 LED blinks.
Charge state: < 25 %

Items supplied

Charger, operating instructions.

Technical data

C 4/36-MC4
Output voltage
7.2 V … 36 V
1.7 kg
Output power
100...127 V
90 W
220...240 V
90 W


Switching the charger on

  • Plug the supply cord into the power outlet.
    • The green supply voltage LED on the charger lights.

Inserting and charging the batteries

The batteries are charged in the order in which they are inserted, unless electric power to the charger is interrupted. As soon as electric power returns, the battery on the left (interface 1) will be charged first, followed consecutively by the other batteries in interfaces 2 to 4 in numerical order.
For safety reasons it is recommended that the battery is removed from the charger after completion of the charging cycle.
When charging of a battery is complete, the charge state display on the battery goes out and the charge status LED on the charger lights.
Li‑ion batteries are ready for use at any time, even when only partly charged. Charging progress is indicated by the charge state LED display on the battery.
Image alternative
  1. Before inserting the battery, check that the contacts are clean and free from grease.
  2. Push the battery into the interface provided.
  3. Check that the battery and charger interfaces match (keyed fit).
    • The battery is identified by the charger when fully inserted and engaged. As charging begins according to the order of insertion, each battery will begin charging in turn.

Removing the battery

Image alternative
  1. Press the catch to release the battery.
  2. Pull the battery out of the charger.


If the trouble you are experiencing is not listed in this table or you are unable to remedy the problem by yourself, please contact Hilti Service.
Possible cause
Action to be taken
A battery is in the charger: the charge state display on the battery and charge status LED on the charger don’t light.
Charging has not started yet as it is not this battery’s turn.
  • Remove the other batteries from the charger. If charging still doesn’t start, then the battery is faulty. Have the battery checked by Hilti Service.
The battery may be faulty.
  • Remove the battery from the charger. If no LED lights on the battery after activation of the charge state display, the battery is faulty. Have the battery checked by Hilti Service.
The battery temperature LED on the charger blinks.
The battery is too hot or too cold: the battery doesn’t charge.
  • The charger switches automatically to charging mode as soon as the battery reaches the required temperature.
The supply voltage LED on the charger doesn’t light
Charger malfunction.
  • Unplug the charger and then plug it back in. If still no LED lights, please return the charger to Hilti Service.

Care and maintenance

Risk of injury with battery inserted !
  • Always remove the battery before carrying out care and maintenance tasks!
Care of the product
  • Carefully remove stubborn dirt.
  • Carefully clean the air vents, if present, with a dry, soft brush.
  • Use only a slightly damp cloth to clean the housing. Do not use cleaning agents containing silicone as these can attack the plastic parts.
  • Use a dry, clean cloth to clean the contacts of the product.
Care of the Li‑ion batteries
  • Never use a battery with clogged air vents. Clean the air vents carefully using a dry, soft brush.
  • Avoid unnecessary exposure of the battery to dust and dirt. Never expose the battery to high levels of moisture (e.g. by being dipped in water or left in the rain).
    If a battery has been soaked by moisture, treat it as a damaged battery. Isolate it in a non-flammable container and consult Hilti Service.
  • Keep the battery free of extraneous oil and grease. Do not permit dust or dirt to accumulate unnecessarily on the battery. Clean the battery with a dry, soft brush or a clean, dry cloth. Do not use cleaning agents containing silicone as these can attack the plastic parts.
    Do not touch the contacts of the battery and do not remove the factory-applied grease from the contacts.
  • Use only a slightly damp cloth to clean the housing. Do not use cleaning agents containing silicone as these can attack the plastic parts.
  • Check all visible parts and controls for signs of damage at regular intervals and make sure that they all function correctly.
  • Do not use the product if signs of damage are found or if parts malfunction. Immediately have the product repaired by Hilti Service.
  • After cleaning and maintenance, install all guards and protective devices and check that they are in full working order.
To help ensure safe and reliable operation, use only genuine Hilti spare parts and consumables. Spare parts, consumables and accessories approved by Hilti for use with your product can be found at your Hilti Store or online at:


Risk of injury due to incorrect disposal! Health hazards due to escaping gases or liquids.
  • DO NOT send batteries through the mail!
  • Cover the terminals with a non-conductive material (such as electrical tape) to prevent short circuiting.
  • Dispose of your battery out of the reach of children.
  • Dispose of the battery at your Hilti Store , or consult your local governmental garbage disposal or public health and safety resources for disposal instructions.
Image alternative Most of the materials from which Hilti tools and appliances are manufactured can be recycled. The materials must be correctly separated before they can be recycled. In many countries, your old tools, machines or appliances can be returned to Hilti for recycling. Ask Hilti Service or your Hilti representative for further information.
In accordance with the European Directive on waste electrical and electronic appliances and its implementation in conformance with national law, electrical and electronic appliances that have reached the end of their life must be collected separately and returned to an environmentally compatible recycling facility.
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  • Do not dispose of electrical and electronic appliances together with household waste!

Manufacturer’s warranty

  • Please contact your local Hilti representative if you have questions about the warranty conditions.