Under charge load it probably is the right charger and voltage of apx
1.36-1.5v. 1.35 is fully charged for a nicad. 1.2v is considered
discharged. Likely just a cheap battery as alot of junk is made. Sanyo
and Panasonic are tops. Just don`t leave in the charger and overcharge,
and over discharging ruins nicads. When it just slows it is dead. 1.2v
is discharged