This is the Olympus BLM-5 Lithium-Ion Rechargeable Battery. Small and lightweight, Lithium-Ion batteries can be charged or discharged at any time without developing memory effects. It must be noted that this battery can only be charged in the Lithium-Ion Battery Charger(BCM-5). If you do not own this charger, it is suggested that you purchase the Battery Charger Kit that contains both the BCM-5 Charger and BLM-5 Battery.
Note! This battery also replaces the BLM-01 battery. However, it cannot be charged in the Li-Ion Battery Charger BCM-01