There is an Tape & Reel (TR) package that contains it. It uses an analog integrated circuit of type BATTERY CHARGE CONTROLLER.The battery pack has 8.4V.It operates on the basis of 20 pins.A 5.5V supply voltage can be applied to it.A minimum working temperature of -30°C degrees Celsius is required for reliable operation.Operating temperatures up to 85°C°C allow for reliable operation.
BD8668GW-E2 Features
Battery pack voltage of 8.4V
BD8668GW-E2 Applications
There are a lot of ROHM Semiconductor BD8668GW-E2 Battery Chargers ICs applications.