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Usually when the battery doesn't hold a charge anymore (even if you've plugged it in to a power source for quite a long time), the device will not longer work ... i.e. it freezes or shuts down. That's because the GPS uses power from the battery and not from the AC power source (that is plugged in and charging the device). Replacing the battery may bring it back to life ...
1. Turn off your phone when it's not in use. If you're not using your Verizon Wireless Razr, then shut it off. Your battery will last much longer if you regularly do this. 2. Charge your phone less. If you charge your Razr nightly, then your cell phone battery won't last long. Try to charge your phone only a few times a week to extend the battery life. 3. Keep your Bluetooth turned off when you're not using it. Applications, like Bluetooth, are notorious for sucking the power from a cell phone battery. 4. Protect your Razr from extreme temperatures. Your cell phone battery lasts longer if kept at room temperature. 5. Discharge the Razr fully. Before you charge your phone, let it completely die. You can extend the life of the battery by regularly discharging and then fully charging it. 6. Leave the battery in the phone. Keep the Razr battery dry and free of dirt to prolong its life.
The nuvi 200W is an older unit and it may be possible that the battery has run it's life out. The average life span of a GPS battery is 2-3 years and possibly a bit longer depending on different factors such as climatic conditions, amount of usage, etc.
I assume we're not discussing the Sony DSC-W55 since that doesn't use AAA batteries. The battery life varies depending both on the camcorder and the type of batteries. In general, lithiums will last longer than alkalines, which will last longer than a single charge on NiMHs. On cameras that give you the option, you'll use less juice shutting off the display and using the viewfinder. Many manuals will give you estimates of battery life, but these are estimates only, the battery life also depends on how YOU use your camcorder.
I have a 3100z and you are right that alkaline batteries do not last long. The thing to do is buy a couple of sets of NiMH rechargable batteries and they last much longer. I,ve just been on holiday and had no problems at all with the batteries. (Although the camera does not give much warning when they need replacing).