When to replace your battery

If you notice that the amount of time you can use your device before having to recharge the battery is decreasing, it’s probably time to replace the battery. Your hardware manufacturer’s Web site is the best place to buy a replacement, and most Windows Mobile device manufacturers offer optional high-capacity batteries that double the amount of time you can use your device between charges.
Note that hardware manufacturers often keep spare batteries for older, discontinued units. If you can’t find a replacement battery listed on the manufacturer’s Web site, contact their tech support department and see if they have them listed as a replacement part. (That goes for cables, cradles, and other accessories for discontinued devices.)
Finally, there are a number of independent vendors that sell replacement batteries for Windows Mobile devices, including MobilePlanet.com, PDAMods.com, and PDASmart.com.

Battery life expectancy
The normal life expectancy of a lithium-ion battery in a Windows Mobile device is between two to three years, or 300 to 500 discharge/charge cycles. After that, the battery will start to degrade (regardless of usage intensity) and will hold less power after a charge. Here are a few tips about using lithium-ion batteries:
  • It’s better to do frequent partial discharges; full discharges should be avoided.
  • When you charge a lithium-ion battery for the first time, it will only be at around 70% power when fully charged. It should reach full capacity after two or three discharge/charge cycles.
Based on tips from Dan Hanttula, pocketpcjunkies.com, and aximsite.com
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