This battery is rated a bit higher than the stock battery and performs better than the stock battery. Garmin Edge Garmin Forerunner  305 205.

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My 305's are the best around, better than new the battery will last all day and night and the unit will not turn off on you like stock ones. Check out my other items!

This battery is the same as the stock battery.

If your 310xt won't display anything when connected to the charger, a battery replacement will not fix it.

Forerunner 110 210