Custom Battery Pack Solution: DNK-LTB6S4PC21
At DNK Power, we specialize in engineering custom lithium battery solutions tailored to our clients’ exact performance and integration needs. The DNK-LTB6S4PC21 is a recent example of our custom pack development — a compact, high-energy-density 22.2V/20Ah battery built on premium 21700 cylindrical cells in a 6S4P configuration.
Project Highlights:
- Energy Capacity: 444Wh in a compact 130×93×73mm footprint
- Cell Technology: 21700, 3.7V/5000mAh cells for high energy density and long cycle life
- Performance: 15A max continuous discharge, 25.2V/5A charging input
- Connectivity: XT60 discharge connector with DC charging port for easy integration
This pack was engineered to balance compact size with strong power delivery — ideal for e-mobility, robotics, and portable power applications where space and weight are at a premium.
As with all our projects, this pack was fully customizable — from voltage and capacity configuration to connector types and enclosure design — allowing us to meet the specific technical requirements of the client’s application.
1.Don’t disassemble or modify the battery
DNK battery pack is packaged by Aluminum laminated plastic film which is easy to be damaged by sharp edge such as pin, needle, edge of devices like nickel tabs, etc. If they have serious damage, electrolyte leakage, short-circuit between positive and negative tabs, etc. It would cause the generation, smoke, rupture, or flaming with mishandling.
2.Don’t incinerate or heat the battery pack
Don’t use or leave battery nearby fire, stove or heated place (more than 130℃). These occur the melting of insulator, damage of safety function, or ignition on electrolyte. In case that separator made of polymer is melted by high temperature, the internal short-circuit occurs in individual cells and then it would cause the generating, smoke, rupture or flaming.
3.Don’t use any damage battery pack
Don’t use the battery that are dented or bent on their edge part. DNK batteries are possible to be damaged by strong mechanical shock and it would cause wire break, short-circuit inside the cell, leakage of electrolyte, etc.
4.Don’t drive a nail into a battery pack, strike it by hammer, or tread it.
As the battery might be broken or deformed and then it will be short-circuited, it would cause the generating, smoke, rupture or flaming.
5.Don’t give battery pack impact or fling it
If the battery is broken, the battery will be charged at abnormal voltage or current and abnormal chemical reaction will occur. It may cause the generating, smoke, rupture or flaming.
6.Don’t make the direct ultrasonic wave power to the battery or soldering near the battery
It may cause serious damage to the batteries. Soldering near the battery may cause damage of the components, such as separator and insulator, are melted by heat, it would cause the gas generating, smoke, rupture or flaming.
7.Don’t use battery nearby the high temperature place or under the blazing sun.
DNK batteries have possibility to be degraded its performance such as capacity, thickness increase, impendence, etc. The battery will be charged at the abnormal chemical reaction occurs in the high temperature place. The thickness change may lead to stressing on battery case/ device, wiring or cell which may have possibility to lead to damage performance.
8.Don’t use the unspecified charger.
If the battery is charged with unspecified condition, there are causes that it will be overcharged or the abnormal chemical reaction will occur in cells. It causes the gas generating, smoke, rupture or flaming.
9.Don’t reverse polarity (and terminals)
On charging, the battery is reversed-charged and abnormal chemical reaction occurs. There may be case that unexpected large current flows on discharging. There causes the generating, smoke, rupture or flaming.
10.Don’t reverse-charge or reverse-connect
The battery has polarity. In case the battery is not connected with charger or equipment smoothly do not force them to connect and do check polarity of battery. If the battery is connected to opposite polarity with charger. It will be reverse-charged and abnormal chemical reaction will occur. It would cause the generating, swelling, smoke, rupture or flaming.
11.Don’t connect battery to the plug socket or car-cigarette-plug
Added high voltage to the battery, the excessive current will flow in it and then it may cause the generating, swelling, smoke, rupture or flaming.
12.Don’t use battery for another equipment
If the battery is used for unspecified equipment, it will deteriorate its performance and cycle-life.
13.Don’t touch a leaked battery directly
In case the leaked electrolyte gets into eyes, wash them with fresh water as soon as possible without rubbingeyes. And then, see a doctor immediately. If leave damaged eyes undone, it will cause eye-trouble.
14.Keep the battery away from babies
Keep the little battery out of the reach of babies in order to avoid troubles by swallowing. In case of swallowing the battery, see a doctor immediately.
15.Don’t get into a microwave or a high pressure container
Because of sudden heat or damage of sealing condition of battery, it may cause the generating, smoke, rupture or flaming.
16.Don’t use a leaked battery nearby fire
If the liquid leaks from the battery (or the battery gives out bad smell), let the battery leave from flammable objects immediately. Unless do that, the electrolyte leaked from battery may catch fire and it would cause the smoke, flaming or rupture of it.
17.Don’t use an abnormal battery, such as leakage, swelling, deformation, etc.
In case the battery has bad smell, it generates, its color change or it is warped in using (includes charging and storage), let it take out from equipment or charger and do not use it. If an abnormal battery is used, it may generate bad performance or damage the device or pack.
FAQ – DNK-LTB6S4PC21 (22.2V 20Ah Lithium Battery Pack)
Q: What is the voltage and capacity of this battery pack?
A: The DNK-LTB6S4PC21 is a 22.2V nominal battery pack with a capacity of 20Ah, giving a total energy of 444Wh.
Q: What type of cells are used?
A: It uses 21700 cylindrical lithium-ion cells (3.7V, 5000mAh each), arranged in a 6S4P configuration for a balance of voltage, capacity, and discharge performance.
Q: What is the maximum discharge current?
A: The pack supports up to 15A continuous discharge output.
Q: What are the charging requirements?
A: The pack accepts charging input of 25.2V at up to 5A max. We recommend using a compatible smart charger matched to these specifications to ensure safe and efficient charging.
Q: What connectors does the pack use?
A: It comes equipped with an XT60 connector for discharge/output and a DC barrel connector for charging input.
Q: What are the physical dimensions and weight?
A: The pack measures 130 × 93 × 73mm. (Weight can be provided separately if needed — let us know if you’d like this added.)
Q: What applications is this battery pack suitable for?
A: It’s well suited for e-mobility devices (e-bikes, scooters), robotics, portable power stations, and other applications requiring a compact, high-capacity power source.
Q: Is this pack customizable?
A: Yes. Voltage, capacity, cell configuration, connector types, BMS specifications, and enclosure design can all be tailored to meet specific project or OEM requirements.
We have made stone fundation in your custom battery certification
1.On-shelf certifications for batteyr cells like CE, ISO 9001, IEC 62133, MSDS UN38.3, KC, UL 1642,etc.
2.Ready help for your certifications of battery packs.
