1.Automatic replacement thin film, convenient health 2.Feel ... instruction for switch on or off.b, When the toilet seat is working, the led is always on.c,When ... the normal working.b,Disassemble the battery from the toilet seat. Charge the battery in somewhere else. Re-assemble ... the battery to the toilet seat. Then use the toilet seat. (Suggestion: If you have a lot of toilet seat, use spare battery for ...