there are some times when you are not happy with the latest verison of some app, or the newer version stops running on older devices, so this is the time when you want to try out the older version fo the same app & see what version works for you, so below you will find many diffrent older version of the battery.d app, you can simply choose the verison you like, click the version no, your will get a prompt to save the apk file, save the apk file & then you can easily install it directly from your file manager, in some cases the phone might not let you install an app diretly from an apk file, so this is when you need to follow this tutorial Batter doctor apk, go to our main page & at the bottom you will see a video as well a video tutorial on how to install the apk file.
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