This is a very nice Approach S2.  The battery is new.  Software and Course database are both updated.  Includes a USB charging cradle.

This is a very nice Approach S2.  The battery is new.  Software and Course database are both updated.  Includes a USB charging cradle.

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 is a very nice Approach S6.  The battery is new.  Software and Course database are both updated.  Includes a USB charging cradle.

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!

My 500's are the best around, better than new the battery will last all day and night.

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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Forerunner 110 210

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.