3900mAh Battery Pack for Sony NP-FM30, NP-FM50, NP-FM70, NP-FM90, NP-FM91, NP-QM50, NP-QM51, NP-QM70, NP-QM71, NP-QM71D, NP-QM90, NP-QM91, NP-QM91D InfoLITHIUM M Series Rechargeable Lithium-ion Package Includes: 1x NP-QM91D Battery Pack 100% Compatible With Original Manufacturer Equipments and Chargers. Absolutely No Memery Effect So That You Can Charge Battery At Anytime. Safe and Reliable, Perfect for Using on Travelling and Outdoor Activities 100% New High Quality Generic (Non-OEM) Rechargeable Lithium-ion Battery Pack.