Those inexepensive lamp timers are great. I have also used them to for IP cameras and routers that sometimes lock up . The downside of using the is that they are electrical power "vampires" . I guess the electronic models are best if you can find them a deep discount .
I don't have this exact problem but I have similar one when the phone is 15-20% it suddenly drops down to 10% and then drops down again to 1% !!!
But can last for an hour on 1% or sometimes shutdowns but when I start it again without changing it's 20% again!!????
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