*UPDATE*
I've just taken all three of my controllers apart including the good working one.
I'm now convinced that the two with the dodgy batteries are FAKE!
They have completely different internals and the batteries are smaller and have no text on them. They are also soldered to the PCB whereas the original has a connector.
I'm going to order a couple of the cheap Chinese batteries from eBay and solder them in place of the old ones.
These
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If you're after replacing the original battery, here are the specifications (taken from the original Sony battery);
- Model: LIP1359 Li-ion
3.7v 570mAh/2.1Wh
Maximum Charge - Current 0.4A
Maximum Charge - Voltage 4.2v
(Typ. 610mAh)
I found some of these on eBay. They're after-market as Sony don't sell them AFAIK, and they're a lot more expensive than the ones I'm going to buy. They have the correct model number and spec' from what I can tell.
These
I'll update with my results when the new batteries are fitted and have been road tested. 