2000mAh Li-Ion Battery for Garmin GPSMAP 276C , 296 , 376C , 378 , 396 , 478 , 496 GPS

• Li-Ion Rechargeable Internal PDA Battery
• 2200mAh High Capacity means more long runtime
• Voltage: 8.4V
• 100% compatible with Original Battery and Charger devices
• No Memory Effect, The battery can be recharged without loss of capacity;

The battery is an exact replacement for my Garmin GPSMap 478. It arrived quickly and is functioning well. A good value and a lot cheaper than the OEM.

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This battery works so well I just picked up a second one for my GPS 496. Most of the rentals don't seem to have a 12 or 24v plug. These are cheap insurance when you need to leave the XM weather plugged in. Otherwise, unplug the XM antenna after the first couple of updates, then plug it in once an hour for an additional update to conserve the battery power.

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Wish I could give this a better review, but mine only lasted nine months after four uses, then died never to be revived. As described in other reviews, it did not lock when I first installed it, but I was able to bend the tab and finally get it to lock.

I am about to buy a different brand to replace this one.

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The price for this battery is good.

The plastic molded case for the battery is poor.

without finding something to wedge the battery in place the battery will disconnect from the contacts.

This can be aggravating.

This battery replacement is adequate, but not ideal.

I purchased the battery despite some bad reviews. I should have known better. The battery does not fit my garmin gpsmap 478 very well. It keeps popping out. However, that is not the only problem. The battery would not charge completely. It would only charge to about a third of its potential.