This replacement battery fits the following devices:
NEC G355 and G955. Battery number 690104.
Nortel 4027 and 4070. Battery number 690104.
Avaya 4027 and 4070. Battery number 690104.
EnGenius FreeStyl2 and EP-802. Battery number FREESTYL2BA.
Alcatel Lucent DECT 8232. Battery number 3BN67332AA and 10000058.
Mitel 5610. Battery number 51015404.
Snom M9 and M3. Battery number 60020438.

The 1200 mAh capacity rating is about 85% higher than the OEM's capacity rating.