MaximalPower branded New 100% OEM Compatible Li-Ion Rechargeable Battery. Guaranteed to meet or exceed OEM specifications. Works wonderfully for: Olympus FE-4020, FE4020 Olympus FE-4040, FE4040 Olympus X-940, X940 and more models. Make sure you get the MaximalPower Branded as we are one of the best oem battery seller at amazon.com for past three years. Best replacement for the following OEM battery part numbers: Olympus LI-70B, Olympus LI70B.