Why does that trimmer charger red led light up, but not charging!

Vintage t9 trimmer charger red led light up but not charging. Please watch to know the reason. Thanks.
#how to #repair #diy #fix #home remedy #home diy #tutorial video
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[@fercants7669]

Battery pala ang may salarin!

[@Icooo69]

Okay then i need to change it 😕

[@JunbaTeks]

Ya