Unitech Energy System Limited
| Payment Terms | 30% before production，70% before delivery |
| Supply Ability | 1000 packs per month |
| Delivery Time | 20 |
| Packaging Details | two pcs in a carton box |
| Voltage | 28 V |
| Capacity | 4 Ah |
| Cell | Sony Lithium Ion Battery |
| Application | Sweeping robots, toy car, medical equipment |
| OEM/ODM | Acceptable |
| Warranty | 1 year |
| Cycle Life | 1000 times |
| Battery Type | rechargeable lithium battery packs |
| Protection | Over-Discharge, Over-current, Over-charge, High temperature |
| Key Words 1 | deep cycle lithium battery |
| Key Words 2 | rechargeable power pack |
| Key Words 3 | custom lithium ion battery manufacturers |
| Battery Size | 38*70*145 MM |
| Charge Method | CC/CV |
| Battery Color | Blue |
| Certificate | UN38.3, MSDS, ROHS, IEC62133, CB |
| Storage Humidity | 65±20% RH |
| Working Temperature | -20℃ ~60℃ |
| Discharge Current | within 1C Rate |
| Internal Impedance | ≤100 mΩ |
| Charging Voltage | 31.79 V |
| Cut-off Voltage | 21.19 V |
| Brand Name | KAYO |
| Model Number | 21700-Lithium-0554 |
| Certification | UN38.3, MSDS, CE, ROSH, CB, IEC62133 |
| Place of Origin | Shenzhen China |
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Product Specification
| Payment Terms | 30% before production，70% before delivery | Supply Ability | 1000 packs per month |
| Delivery Time | 20 | Packaging Details | two pcs in a carton box |
| Voltage | 28 V | Capacity | 4 Ah |
| Cell | Sony Lithium Ion Battery | Application | Sweeping robots, toy car, medical equipment |
| OEM/ODM | Acceptable | Warranty | 1 year |
| Cycle Life | 1000 times | Battery Type | rechargeable lithium battery packs |
| Protection | Over-Discharge, Over-current, Over-charge, High temperature | Key Words 1 | deep cycle lithium battery |
| Key Words 2 | rechargeable power pack | Key Words 3 | custom lithium ion battery manufacturers |
| Battery Size | 38*70*145 MM | Charge Method | CC/CV |
| Battery Color | Blue | Certificate | UN38.3, MSDS, ROHS, IEC62133, CB |
| Storage Humidity | 65±20% RH | Working Temperature | -20℃ ~60℃ |
| Discharge Current | within 1C Rate | Internal Impedance | ≤100 mΩ |
| Charging Voltage | 31.79 V | Cut-off Voltage | 21.19 V |
| Brand Name | KAYO | Model Number | 21700-Lithium-0554 |
| Certification | UN38.3, MSDS, CE, ROSH, CB, IEC62133 | Place of Origin | Shenzhen China |
| High Light | 4000mAh Battery Power Pack ，31.79V Charging Battery Power Pack ，28Volt Deep Cycle Lithium Battery | ||
4000mAh 28 Volt Battery Power Pack with Custom Battery Design
The model battery can be replaced for:
Drone batteries, Motorcycles batteries, cars batteries, buses batteries, trucks batteries, yachts batteries, Launch batteries, ships batteries, Tricycles batteries, Pedicab batteries, racing cars batteries, three wheeler vehicle batteries, Limousine batteries, Bank Power supply systems batteries, UPS batteries, Telecom Stations batteries, Solar Energy Storage batteries, Wind Energy Storage batteries, Hospital Power Supply system batteries, Home Power System batteries, etc.
| Product Specification | |
| Product Name | 4000mAh 28 Volt Custom Battery Power Pack |
| Nominal Voltage | 28 V (Customized 3.2V 3.7V12V 24V 36V... 72V) |
| Nominal Capacity | 4 Ah (Customized 2.6Ah, 3.5Ah...200Ah) |
| Standard Charge Current | 2000 mA |
| Max Charge Current | 4000 mA |
| Charge Cut-off Voltage | 31.79 V |
| Standard Discharge Current | 2000 mA |
| Max Cont Discharge Current | 4000 mA |
| Discharge Cut-off Voltage | 21.19 V |
| Material | NMC battery ( or LiFePO4 battery, Lithium Cobalt battery) |
| Cell/ Brand | Sony cell (or Panasonic cell, Samsung cell, Sumsung cell) |
| Cell Type | Lithium Ion battery(or Custom Li polymer battery ) |
| Temperature Range | Charge temperature: 0°C to 45°C |
| Discharge temperature: -20°C to 60℃ | |
| Storage temperature: -10°C to 50℃ | |
| Life Cycle | More than 1000cycles |
| Package Material | Shrinked PVC |
| Certification | ROHS, UN38.3, MSDS, IEC62133, CB...etc |
| Key Words | Li-ion battery pack, 18650 battery pack, Lithium Ion battery pack, Rechargeable Lithium battery pack, 18650 Lithium battery pack, Custom Battery pack |
One pc in a PE bag, and then in a standard export carton or Custom-made Package.
Delivery Methods:
① By express UPS/DHL/FEDEX/TNT (It takes 3-5 days to arrive).
② By airfreight (It takes about 3~7 days to arrive) .
③ By sea shipment (It takes about 35 days to arrive).
Delivery Time: 3-5 days for samples, 8-20 days for mass production, depend on the QTY.
We provide one-stop battery power solution, including cell selection, battery pack design, PCM/BMS design, battery pack assembly, OEM Packing and after sales service.
Company Details
Year Established:
1999
Total Annual:
43 million-45million
Employee Number:
200~500
Ecer Certification：
Site Member
Unitech Energy System Limited was established in 2009, which specialized in Design, Research, Manufacture and Distribution of high performance and environmental friendly Lithium Ion Battery. They comprised of Li-ion polymer battery, Li-ion cylindrical battery, LiFePO4 battery and various kinds o... Unitech Energy System Limited was established in 2009, which specialized in Design, Research, Manufacture and Distribution of high performance and environmental friendly Lithium Ion Battery. They comprised of Li-ion polymer battery, Li-ion cylindrical battery, LiFePO4 battery and various kinds o...
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