Garmin, Navman, TomTom and Yakumo, these are all names of GPS device manufacturers. And just like cell phone, smart phone or PDA manufacturers, the makers of GPS devices too ensure that only their own batteries work in their devices. Many is the time when one thinks that would not life be simpler if all electronic device manufacturers agreed to standardize the batteries they use in their devices so that customers can simply pick them up from their nearest store like we do AA, AAA, D, etc cells. However, there are certain factors which prevent this from happening and are common-sense enough that anyone can comprehend them. First and foremost, each electronic device (be it cell phone or GPS device, from the same manufacturer or from a different one) has different shapes, sizes, features, etc. This means that where a simple monochrome cell-phone with no camera or music playing capabilities would have very low power requirements; a high-end phone by the same manufacturer with a camera, music playing capabilities, bluetooth, infrared, WAP, animated screensavers and themes, etc would have comparatively higher power consumption. Another problem could be that most cell phones and PDAs have unique shapes and thicknesses and the batteries must be adjusted accordingly. The same applies to laptops and laptop batteries as well as GPS devices and therefore to GPS batteries.
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