12v 35a U1 UPS Battery replaces 33ah

3.6 v 800ma Ni-mAh cordless phone battery:

3.6V 800mAh Ni-MH cordless phone battery combines the advantages of rechargeability, environmental friendliness, and versatility, making it a popular choice for powering a variety of portable electronic devices, particularly cordless phones, where reliability and long-lasting performance are essential.

Rechargeable P107 3.6V 650mAh Battery for Panasonic Cordless Phone