XTAR 21700 HP 5000mAh 25A Protected Li-Ion Rechargeable Battery - BUTTON TOP

These are the latest 2026 XTAR 21700 HP 5000mAh 25A Protected Li-ion rechargeable battery designed for devices requiring high current output, long runtime and dependable performance. Featuring a built-in protection circuit and a true 25A maximum continuous discharge rating, this battery is ideal for super high powered flashlights, headlamps with turbo mode and other compatible high powered 21700 devices.

Note: NOT TO BE USED FOR VAPING DEVICES

As these cells are longer than the standard version, they may not fit in all chargers. Please click HERE to direct you to compatible chargers.

Key Features

• High Capacity: 5000mAh for extended runtime
• Safe & Protected: Built-in PCB protects against over-charge, over-discharge, over-current, and short-circuit
• 25A Continuous Discharge: Real 25A discharge current suitable for high powered LED torches with turbo mode
• Button Top Design: Compatible with many flashlights and electronics requiring a protruding positive tip

Specifications

• Brand: XTAR
• Battery Type: Rechargeable Li-ion (21700)
• Typical capacity: 5000mAh
• Minimum capacity: 4900mAh
• Nominal Voltage: 3.6–3.7V
• Discharge cutoff voltage:2.5V
• Max Continuous Discharge: 25A
• Energy: Approx. 18.5Wh
• Terminal Type: Button Top
• Protection: Yes (PCB protected)
• Dimensions: Approx. 21.4mm x 74.7mm
• Protected cells are longer than standard unprotected 21700s — please check device compatibility before purchasing
  

These batteries will arrive part charged. Please fully charge to reach full capacity.

Usage & Charging

!!!!! IMPORTANT!!!!! These are immensely powerful batteries, and extreme care should be taken using them. Only use with brand name, quality chargers. Unfortunately, we cannot replace batteries that are damaged by non-compliant chargers or equipment. There are so many chargers on the market, we cannot possibly keep track of which ones will work with these batteries. You will have to contact the charger manufacturer to ensure it can charge these batteries without damaging them. Please ensure you only use these (or any other Lithium Ion) batteries with proper Lithium-Ion chargers and equipment. Lithium-Ion batteries can easily be damaged by charging them with too high current or exceeding the maximum rated current discharge. 

Use at your own risk. We do NOT accept any responsibly for damage, injury or death caused by improper use of these batteries!

• Do not overcharge! Ensure the charger voltage does not exceed the batteries stated full charge voltage.
• Do not over-discharge! Ensure the equipment you use do not draw more current than the batteries “Maximum Continuous Discharge Current”.
• Do not leave batteries discharged for a long period! Leaving Li-Ion batteries in a discharged state can incur irreversible damage – creating a loss in capacity and a loss in cycles.
• Do not short circuit your batteries! Short circuiting can cause a huge surge of current that will potentially burn out your battery, damage your equipment, and even cause serious injury to you!
• Do not let your batteries touch each other or other metallic items! Keeping your batteries loose, such as in your pockets, is a serious way to have your batteries fail and seriously harm you. There are battery holders and covers to keep your batteries safe.
• Do not dispose any battery in a fire! There are dangerous chemicals in batteries. If you try to burn your batteries, they will release dangerous fumes and will probably explode. Always dispose your old batteries to a battery recycling centre.