My T665 battery is finally dead. In searching for a replacement, the parts sites are offering a battery that is designed for the T415/615/665. Unfortunately, it is a 3.7v 720mah battery and the T665 uses a 5.2v 1000mah battery. The battery they are selling is the battery that made us fed up with short battery life of the T415/615. The battery it takes is the one used in the TH55. Except the TH55 uses a different connector.
Has anyone found a source for the right T665 battery? The best option I can find so far is to get the TH55 battery and solder the T665 connector to it.
That's strange. All the places I've looked(2 online retailers & eBay) all have the 3.7 listed as being the battery. Are you 100% that the 5.2 is the one? I had one for a time and don't remember for sure.
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Yes. I pulled the back off the T665 and the OEM battery is 5.2v 1000mah. The 3.7v battery is the one from the T615. The 3.7v battery will work in the T665 because it probably is the battery that was made for the 615. It just doesn't provide the same time between charges. My T615's battrey only lasted about 9 months. The battey in my T665 provided longer service between charges and has lasted for about two years.