Shenzhen Wholesale Electronics High Quality Low Price 18650 battery 4000mah

Shenzhen Wholesale Electronics High Quality Low Price 18650 battery 4000mah

 The Product Images:

Specification for 18650 battery 4000mah:

Key components and selected materials:

Professional test system:

Payment & shipment:

Quality and Guarantee:

Product standard: From design, material preparation to production, quality control, sales and customers service, MassPower batteries follow the ISO9001, CE, RoHS international standard.

Life expectancy: All MassPower batteries use full A+ battery cells. No A or B grade low quality cells inside so that MassPower batteries have longer working life and larger capacity. We guarantee full and real labeled capacity.

Power management: All MassPower rechargeable batteries have built-in high quality PCB board, chrging protectors, thermal protectors and circuit breakers, effectively avoiding the over-charge, over-discharge, over heating and short circuit. You will have complate confidence on our products.

Our Factory and Production Line: