A recent teardown from a famouns Chinese website revealed the battery for Edifier FitFree Open True Wireless Earphone. Its earbuds uses a li-polymer cells made by VDL, the cell model is 1254PF4E with two wires.
While Edifier FitFree's charging case uses a bigger battery, its model number is 503240 rated at 660mAh. Like most charging case, its battery has no connector, but is soldered to the main board, however it has three wires instead of two wires.
While Edifier FitFree's charging case uses a bigger battery, its model number is 503240 rated at 660mAh. Like most charging case, its battery has no connector, but is soldered to the main board, however it has three wires instead of two wires.
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