Progo Battery for Fujifilm NP-W126 and Fuji X-T1, FinePix HS30EXR, HS33EXR, HS50EXR, X-A1, X-E1, X-E2, X-M1, X-Pro1 Progo Li-ion Rechargeable extended power battery for Fuji NP-W126 Integrated microchip prevents overcharging, overheat & provide short circuit protection. High quality Li-Ion battery cell for longer battery life Absolutely no memory effect so that you can charge battery at anytime One year manufacturer warranty