Question about Dell Latitude C640 Notebook

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Dell c640 laptop battery

Need to replenish the battery and can't recall how to do it. I know your suppose to let the battery run low and turn off and then recharge is this correct.

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Normally that is the best way. Turn your system on and let it run down without the power cord. It will shutdown automatically when the battery is really low. Then with the system off, connect the power cord and let the battery recharge. I'd let give it at least a 10 hour charge if not overnight. Should be OK by then. When you power back up the next day, look for the "icon" that lets you check power levels. That little program should tell you loads of information that you might find useful. Look for "hints' that will extend your battery life too. The newer batteries today no longer have that "Memory Issue" they once had. Just remember re-chargeable batteries do wear out over time. You can only recharge them so many times but that's now in the hundreds with the newer ones or around 2-3 years depending on usage.

Posted on Aug 26, 2007


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When i comes to digital cameras, you really need top quality rechargables or at least 'alkaline' disposables.
I would highly suggest your batteries are not "powerful" enough for the camera.
Next time you're in the shops, look at the range of rechargables and you'll see, if not on the packet, on the side of the batteries them selves, a "mAh" rating. This is the "power" delivery of the battery. Although all of the rechargable batteries are supposed to be 1.2v, that voltage can be delivered in quantities. As rechargables deteriorate, the voltage may test well on a multimeter, or appear to work well on a low-load appliance, but can not supply the 1.2v fast enough to a high-load unit such as a digital camera.
A cheap check is get some NEW "alkaline" batteries and put them in, if they work, use them and shop around for some quality rechargables - I'd suggest getting the charger with the batteries for their maxumum life.
Please let us know how you go and if this solve the problem or not, so we can chase it further should you need it.

**.The best way to acknowledge contribution is to rate it's relevance.**

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