I have a Casio E-100 and I would like to know what are the 3 contact on the battery JK210LT one is (+) and the other is (-) but there is a middle one with (T) on it what is this one. Battery reads 3.1 v on the (+) and (-) and zero at (T) is that ok?
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If your watch is several years old, I would recommend sending it back to Casio for service and battery replacement. Contrary to what you may hear about solar-powered watches, the rechargeable batteries do not always last for 10-20 years. I've seen some go out in 2-3 years. This is a shorter lifespan than most standard lithium watch batteries.
You may have an authorized Casio service center near you also. If not, contact Casio at the following numbers:
For Repair support in USA at 1-800-706-2534 during regular business hours (currently Monday-Friday 9:00a.m. - 5:00pm EST, Saturday / Sunday 10:00 a.m. - 8:00 p.m.)
For Technical support in USA at 1-800-435-7732 during regular business hours (currently Monday-Friday 9:00 a.m. - 8:00pm EST for all products, Saturday / Sunday 10:00 a.m. - 8:00 p.m)
The cost of your watch well justifies this kind of service, plus, they will assure it remains waterproof up to its specifications.
Had the same problem and contacted Casio and they sent out a new battery. Our camera was in the last month of its Casio 1 year Warranty so I don't know what they will do if yours is out of warranty. They didn't give me any resistance at all so I guess it is something they know is a problem.
You might try this....
Assuming that you deleted a file you shouldn't have, perform a hard reset on the Casio. You know the type, the type that will erase everything from memory and reset the device to like new. I think you hold down the power button while pushing the reset or something like that if I remember correctly.
If you've already reinstalled activesync, they you would be all set.
Does the yellow light come on when you plug the charger in? If so, leave it charging for 2 hours, then do a hard reset while charger is still plugged in. I think, on E-100 it involves holding down Power button, while pressing reset button on the back of the unit with a stylus for a few seconds. Warning: you'll lose all your personal data on E-100 this way - but then again, it's probably lost already.