Technical datas for 4s1p 14.8v:

Key World famous brands cells(Panasonic, Sanyo, Samsung, LG, Masspower...):

Best quality PCM(Protection Circuit Module):

Masspower company building:

Office and workshop views:

Payment and 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 span: 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.

Certificates: