21v Lithium Battery - 4000mAh Battery with Charger Adapter Compatible with All 18v-21v Makita Interface Power Tools, Suitable for Outdoor and Indoor Renovation Work

【Battery Balancing Function】 The YINMAYI replacement battery has upgraded its battery balancing function. It can correct inherent imbalances within the battery, balance each battery cell, maximize the capacity of the battery pack, and ensure that all the energy in the battery is fully utilized. In addition to maximizing battery capacity, the battery balancing function also prevents overcharging and over-discharging of the battery cells, thereby extending battery life!
【High-Capacity 21V Lithium Battery】 Rated voltage: 21V | Capacity: 4000mAh. Built with 10 premium lithium-ion cells to deliver stable power output, longer runtime, and consistent performance for demanding power tool applications.
【Usage & Care Tips】 Fully charge the battery before first use. For optimal performance and longevity, avoid prolonged charging after the battery is fully charged. Store the battery in a cool, dry place when not in use.
[Quality Guarantee] The 4000mAh lithium battery has passed UN38.3 testing, CE certification, and MSDS testing. We perform strict quality inspections on each battery before it leaves the factory. If you are unsure whether your product can use a YINMAYI battery, feel free to contact me anytime. I will help you!
【Fast & Reliable Charger Included】 Charger supports 100–240V AC universal input. Comes with a 1A power adapter and US plug. LED

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