Compatible with Following Model:

Eufy RoboVac 11, RoboVac 11S, RoboVac 11S MAX
Eufy RoboVac 12, RoboVac 15C, RoboVac 15C MAX, RoboVac 15T
Eufy RoboVac 30, RoboVac 30C, RoboVac 30 MAX, RoboVac 35C
Ecovacs Deebot N79,Ecovacs Deebot N79S,Ecovacs Deebot DN622

NOT Compatiable with: Eufy Robovac 11+.

Battery maintenance:

Long time using the battery please wait for 10-20 minutes before recharge.
Do not charge the battery continue over 24 hour.
If you don't plan on using the battery for a month or more, store it in a clean, dry, cool place away from heat and metal objects. Ni-Cd, Ni-MH and Li-ion batteries will self-discharge during storage; remember to recharge the batteries before use.
Do not leave the battery dormant for long periods of time. We recommend using the battery at least once every two to three weeks.
Do not put the battery into a fire or heat the battery.
Do not store the battery in high temperature environment.