Attached are two images of the inside of one of those devices to extend the battery life of your phone. This one was a promotional giveaway and only had their logo on the outside. I tried searching for the text in the second image, but nothing that comes up is likely. I'm hoping there is something I am not realizing in the image that would help my research.

The entire battery and controller The backside of the board, with model number?

!! Update !! I found another one. The little chip reads ETA9640 / 5486B.

  • \$\begingroup\$ No text written on the back side of the battery? \$\endgroup\$ – Unknown123 Apr 21 at 19:35
  • \$\begingroup\$ Did you attack the charger yourself? It certainly looks like a lithium polymer battery and probably 3.7v nominally. \$\endgroup\$ – Marius Gulbrandsen Apr 21 at 22:02
  • \$\begingroup\$ Could you provide a macro photo of the chip on the little board? Or you just read it and post this info... \$\endgroup\$ – smajli Apr 21 at 22:21
  • \$\begingroup\$ Sadly I disposed of it already; the battery was puffed up and broke the case. \$\endgroup\$ – K.A Apr 22 at 3:29
  • \$\begingroup\$ Already puffed up? \$\endgroup\$ – Unknown123 Apr 22 at 6:57

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