5 Years Warranty



21700 Li-ion USB-C Rechargeable Battery-5100mAh


ACEBEAM IMR21700NP-510A is a new generation high performance cell with a maximum capacity of 5100mAh and a USB-C charging port to remove the need for an external charger. This powerful battery has improved performance, and superior energy density compared to previous 18650 batteries. An ideal companion for the L18 or L19 tactical flashlight from ACEBEAM, an extra 21700 is a great back-up battery to have on hand, as more electronic products and ACEBEAM flashlights will utilize this battery.

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ACEBEAM 21700 Li-ion USB-C Rechargeable Battery 5100mAh



Battery Size: 21700

Protected or Unprotected Battery: Protected
Model number: IMR21700NP-510A with Built-in USB-C Port
Chemistry:  IMR Lithium-Ion
Power [W-h]:  18.9Wh
Voltage: 3.7V
Capacity: 5100mAh
Discharge End Voltage: 2.5V
Standard Charge Current: 1A
Max Continuous Discharging Current: 15A
Cycle Rating: 500 Cycles
Charging Cable: USB to USB-C Charging Cable (included)
Charge State Indicator: Charging-Red LED; Full charged-Green LED
Protection Circuit: Integrated safety circuit protects the battery and device
Overheat Protection: Operating at the max output the battery will not overheat, this is part of the protection circuit.
Other Safety Protections: Protects against Overload, Leakage, Short Circuit, Over Voltage, & High Temperature
Certifications:IEC 62133, CE, FCC, PSE, UN38.3, RoHS, REACH
Operating Temperature Range: 0℃ -> 45℃ (Charging); -20℃ -> 55℃ (Discharging)
Self-Discharge: The dormant / self-discharge characteristics of Acebeam batteries are very low. This is one of the advantages of a lithium-ion battery with a control circuit. The battery life in dormant mode depends partly on the environment. High ambient temperatures, and higher humidity, increases the internal drain. But in normal circumstances, a battery installed in a device, like a door lock, will last ~12 months.
Cells Per Battery: 1
Dimensions: Length-3.02" (76.8 mm), Diameter-0.827" (21.3 mm)
Weight: 72.5g



Never expose the battery to water or fire
When charging or using batteries, ensure the positive and negative ends correspond with the positive (+) and negative (-) symbols
To extend the battery life it is recommended that it is charged every three months when unused for long periods
Keep out of reach of children

Please note:

We are unable to accept returned batteries once they have been opened, so please ensure they are the correct cell for your device before ordering.

Due to customs restrictions we do only accept the orders from USA, Australia and some countries of Asia. Any orders for these batteries with EU or Worldwide delivery will be cancelled and refunded.

Existing reviews

nice color camo 9
color ni menarik padu. nak banding dgn L18, lampu L19 ni lagi tajam spill area dia takde. dlm byk2 tactical lights ni L19 pilihan hati. harga sama dengan LEP. L19 the best
along | 8/29/2021 11:57 PM
I want one more!
Great capacity and charging method. (accessorie of l35) Smaller than many mobile batteries so also great for edc mobile battery.
Yoshikaze | 10/30/2021 9:36 AM
Long Run Time
Keeps you going longer with great runtime!
Lo | 4/14/2022 8:26 AM
With powerbank function!
The battery has good performance and an inbuild USB C charging port! But the best: it can be used as a powerbank for your smartphone when you attach the supplied acebeam usb cable!
| 4/22/2022 5:46 AM
Quality, high-capacity battery.
These are good batteries. The USB-C port is very useful, and these batteries are also great for many devices other than AceBeam torches. Works great as a power bank - 5100mAh is quite a high capacity.
Need to get more of these...
| 5/28/2023 5:46 PM
Strong battery.
An excellent balance between amperage and capacity. This battery (in combination with the efficient and well regulated drivers Acebeam uses)  produces long and sustained run-times. The onboard USB-C port can be a convenient feature if you are found without a charger in an emergency. Just be aware this 21700 battery is 5mm longer than standard flat-top and is not compatible with all flashlights.
| 2/27/2024 10:07 AM
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