This is strictly for Infinix users with inbuilt batteries, but other device with inbuilt batteries can go ahead with this method.
Well this tutorial might be difficult to some but thats just the best and ease way to get it fix.
Fix Not charging and SP tool not detecting on Infinix inbuilt battery
Some user do experience interruption during the process of flashing using sp tool, and when this happens, sp tool will stop detecting ur device nd even when plug to charger, it will take days or weeks for it to comes up nd sometime user will jst loss hope. Now here come a way on hw to remove the ba3 ur self nd get charging in jst some secs nd then sp tool wil began to detect ur phone.
How to remove Infinix (inbuilt) battery
> Get a star nd plat screw driver avail to lose the screws, nd den remove the back cover off.
> Now u will see a 14 screw at d back of the fone, jst get them all losed.
> Then carefully remove d case cover after losing all 14 screw.
> Here come the part soo far, after removing the case cover, u will see where the ba3 clip is been cliped with. Carefuly unclip it frm where it been cliped.
> Now plug in ur charger after u removed the ba3 clip frm wher it plugged.
> After ur must have connected ur charger, just key in dat ba3 clip u removed recently nd wait for some secs, nd u wil see ur fone will start charging immediately without ur wasting ur tym charging and waiting for ur fone to come up.
Well this will atleast reduce u the stress of waiting for days or weeks before phone could comes up nd wasting money.
If u find it defficult, pls download the image attached to thia thread for better understanding.