Replacing / Changing / Upgrading the Lithium Ion battery on the Wahl Cordless Senior Amazon Link: HQRP Battery Works with Wahl... www.amazon.com/dp/B07YR1H796?...
My seniors don’t have the same plug in slot. In fact mine has a box shape. The battery slot looks the same but won’t take the tomb45 battery connector.
About the same for mine. 3-4 years before battery dies. But that depends on regular maintenance like oiling the clippers and cleaning them out. I didn’t take much care of mine, left them to charge for long time, got a lot of hair in them but it still worked great
Should be good out of the package, but def won’t have a full charge. Lithium Ion batteries operate at full potential until they run out of charge so you’ll be good
