Lishen 21700-LR2170SA 12A Flat Top 4000mAh Battery - Genuine


$ 3.99
4 reviews

SKU: lishen2170sa

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Lishen 21700 4000mAh 12A Flat Top Battery - Great capacity, great price.

The Lishen LR2170SA 12A 4000mah battery delivers exceptional capacity with mid-range power at a very affordable price. The Lishen LR2170SA is a great value for pack builders looking to maximize run time on a budget. 

Priced per battery, not per pair.

Lishen LR2170SA Data Sheet

Lishen LR2170SA 21700 4000mah Specifications:

  • Size: 21700
  • Approximate Diameter: 21.7mm +/- 0.2mm
  • Approximate Length: 70.9mm +/- 0.2mm
  • Brand: Lishen
  • Manufacturer Rated Nominal Capacity: 4000mAh (4Ah)
  • Manufacturer Rated Minimum Capacity: 3900mAh (3.9Ah)
  • Manufacturer Rated Max Discharge Current:
    • -20-5°C  1.0C (2A)
    • 5-45°C  3.0C (12A)
    • 45-60°C  1.5C (6A)
  • Nominal Voltage: 3.6V
  • Peak Voltage: 4.2V
  • Protected: NO
  • Style: Flat Top
  • Color: Blue
  • Certifications Met:  UN38.3, UL1642, CB, IEC 62133, GB 31241-2014/CQC11-464112-2015, RoHS
  • Origin: China

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If your battery is damaged or defective on arrival (will not take its first charge, or has issues with its first cycle), please let us know within 14 days of receiving your order and we'll make it right. Please read our complete store policy on defective products here for more information and to see if you're eligible.

Manufacturer ratings: Please see more information regarding manufacturer ratings here.

Battery Warning

Warning: Lithium ion batteries may explode or burn due to improper use. Using these batteries for purposes not intended by the manufacturer, including outside a battery pack and/or without a BMS, may cause severe injury and damage. We are not responsible for any injuries caused by lithium ion batteries - use at your own risk.

All rechargeable batteries have inherent risks under any circumstance. Use caution with working with li-ion batteries (lithium-ion), LiPo (lithium ion polymer), and any rechargeable cells (together "rechargeable batteries"), as they have dangerous charging characteristics and are known to explode or burn if mishandled. A purchaser and user of rechargeable batteries should educate themselves on rechargeable batteries, especially as to charging, discharging, assembly, and storage. Learn more about proper storage and care for rechargeable batteries here. We are not responsible for any damage caused by the misuse or mishandling of rechargeable batteries.

Here are a few tips:

  • Never completely discharge batteries (below 2.5V under load or 3V unloaded)
  • Charge fully (to 4.2V) before first use
  • Never charge batteries to 4.3V or above
  • Do not charge unattended
  • Do not store your li-ion batteries fully charged for an extended period of time (weeks or more)
  • If you must store your battery, only store in a case or individual box in a cool and dry place at approximately 3.6-3.7V
  • Use only high quality battery chargers
  • Do not expose to heat
  • Do not connect the positive contact to the negative contact without an appropriate load
  • Never exceed the battery's specifications
  • Never try to charge or discharge li-ion batteries with battery chargers that are not made for li-ion batteries
  • Always charge these batteries on and within fireproof material
  • Never leave rechargeable batteries in a recharging station unattended
  • Do not use any rechargeable battery or charger if any visible damage is present, or if known mishandling, accidental or otherwise, has occurred
  • Always store and transport rechargeable cells in a safe, non-conductive container (never keep a spare battery loose in a pocket, purse, etc. and always use protective cases)
  • Properly dispose of all battery cells and chargers in accordance with local laws and mandates (if you're unsure, contact your local municipality)
  • If a rechargeable battery overheats, hisses, or bulges, immediately quarantine the battery from any combustible materials - ideally, take the battery outside
  • If a rechargeable battery catches fire, the FAA recommends pouring water or soda on the battery and surrounding areas - ideally, use a foam extinguisher to quell the fire

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Filter Reviews:
Vincent B.
United States United States
Lr2170sa battery

Using these batteries in a 3500 lumen flashlight they were great last a long time I just got them but I haven't had any problems and I don't for seeing any

  • What device/application do you use this with? Astrolux eco-1 flashlight
Ben E.
United States United States
Consistently testing above 4200 mah

very impressed with these so far - purchased 4 for testing and evaluating before building a bigger pack with more of them and I have been impressed so far - all 4 test well above 4200mah and they don't drop under 3.7v until after 3800mah of draw - internal resistance is also nice and low around 25 m-ohm very nice!

  • What device/application do you use this with? hobbist electronics
Nicholas N.
United States United States
Great value and perform on spec.

Great performance, good price, and well within the advertised specifications. Also, a big thanks to Jon in support. Super fast response to questions and very insightful.

Gregory Y.
United States United States
Great Batteries

These work really well!

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