The Vapcell F54 is a high-capacity 21700 lithium-ion battery with a typical capacity of 5400mAh and a maximum continuous discharge rating of 10A. It is designed for compatible flashlights and other devices that prioritize extended runtime over very high current output.

With a nominal voltage of 3.6V and a maximum charge voltage of 4.2V, the F54 is suitable for devices specifically designed for rechargeable 21700 Li-ion cells. Before ordering, confirm the required battery length, terminal type, protection status, and discharge-current requirements of your device.

Key Features

• 21700 rechargeable lithium-ion battery
• 5400mAh typical capacity
• 5250mAh minimum capacity
• 10A maximum continuous discharge current
• Up to 20A pulse discharge for 5 seconds
• 3.6V nominal voltage
• 4.2V maximum charging voltage
• Available in flat-top, button-top, and protected button-top options
• Suitable for compatible moderate-drain flashlights and devices

Choosing the Correct Version

Flat Top: Standard unprotected configuration for devices designed for flat-top 21700 cells.

Button Top: Features a raised positive terminal and is approximately 2–3mm longer than the standard flat-top version.

Protected Button Top: Includes a protection circuit and is longer than both the flat-top and regular button-top versions. Confirm the device’s available battery compartment length before purchasing.

Not all 21700 batteries have the same dimensions. Please check your device manufacturer’s requirements before selecting a version.

Important Safety Information

• Use only in devices designed for 21700 lithium-ion batteries.
• Do not use this battery in devices requiring more than 10A continuous discharge.
• Do not mix batteries of different brands, models, capacities, ages, or charge levels.
• For multi-cell devices, use a matched set purchased and charged together.
• Do not use the battery if the wrapper or insulating ring is damaged.
• Never short-circuit, puncture, crush, disassemble, or expose the battery to fire or excessive heat.
• Charge only with a compatible lithium-ion battery charger.
• Keep loose batteries in a protective case during storage and transport.

Browse more Vapcell batteries or compare other 21700 batteries.

SHIPPING
The final shipping cost and estimated delivery timeframe will be available to you during checkout. Currently, we offer 3 International shipping methods which are steady and easy to track. Priority worldwide shipping, Premium ( Partial countries) and a faster Express shipping. The estimated times stated below are not guaranteed. An international package could experience delays like postal strikes or severe weather or Cov-19 situation. All shipping ways, PO Box address is not acceptable.

For some flashlights, there's a pure battery inside（phone charging）,If We can not ship your packages via USPS or DHL,we'll ship your package in another way.

Note:
When you place an order for just the batteries, for easy shipping, faster and safe delivery, the batteries are placed in the flashlights.

If you don’t receive your order within the estimated time frame provided below and suspect that it might be lost in transit, please contact Flashlightgo Support ( support@flashlightgo.com ) and we can look into the order with the courier. Lost-in-transit requests must be submitted to Flashlightgo Support within 3 months of the date of shipping or before the courier archives the tracking information.

Option 1.
Express by DHL/UPS/Fedex/Aramax/SF etc ( there may be tax need to pay in this way),
The estimated time of delivery is usually 3-7 work days depending on the country. Includes detailed tracking and confirmation of delivery.

Option 2.
Premium ( 6-10days, All tax and Duty Paid),
All tax and duty are prepaid to carrier by Flashlightgo before shipping, so you dont need to pay any tax or duty when you get it.

Option 3.
Priority shipping(1-2 Weeks, average 10 days)
If we marked it is with all tax and duty paid, all tax and duty are prepaid to carrier by Flashlightgo before shipping, so you dont need to pay any tax or duty when you get it.

Learn more,Please click on Here.

To ensure that you get the desirable product, we allow a seven-day product return period. Any product return application outside this period will not be entertained.
All returned product must be unused and the original package should be kept.

Return：
We do not offer return for personal products like socks and hats or food, magazine and fragile or dangerous products The original receipt must be available for application of return.

Discount products：
No product return for discount products

Gifts products：
If the item is marked as a gift when purchased and shipped directly to you, it cannot be exchanged , refunded or warranty.

Exchange：
We only replace items if they are defective or damaged.
Exchange service are offered only to wrong deliveries or product damage not caused by client. If needed, please email to info@flashlightgo.com.

Warranty
How long is the warranty period?
Flashlightgo warrants to the original purchaser that the Product(s) shall be free of any defect in material or workmanship for a period of one year for labor and one year for parts from the date of the original order except the items listed below:
Chargers,Batteries and Other Accessories: 3 months warranty

Should the Product(s) supplied by Flashlightgo prove defective because of improper workmanship or material as reasonably determined by us, Flashlightgo agrees, at its option, to either repair or replace the Product free of charge, excluding any shipping or handling charges.

Learn more,Please click here.