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.

discription of Li-Ion Rechargeable Battery 3.7V

When it comes to powering your devices, you need a reliable and efficient battery. The 14500 Li-Ion Rechargeable Battery 3.7V 1200mAh is the perfect solution for a variety of electronics, from flashlights and cameras to remote controls and other gadgets.