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.

If you damaged your display, I will replace the LCD for you.  This is for the internal LCD not the entire top cover.

If you damaged your display, I will replace the LCD for you.  This is for the internal LCD not the entire top cover.

Rubber buttons falling off?  I will replace the bottom cover with a good used one.

Rubber buttons falling off?  I will replace the bottom cover with a good used one and a new battery.

This is a 350mAh battery. My testing shows training time up to 10+ hours in "training mode" a full day with "GPS on" and 2 weeks in power saver (time only) mode

Display replacement service. Displays are used but in good condition.

This battery is the same as the stock battery.

Fenix 3, 4, 5 - This battery is slightly higher capacity as the stock battery.

Fenix 1., 2 - This battery is marked 350mAh, but it lasts about the same as the stock battery labeled 500mAh.

Display replacement service. Displays are used but in good condition.

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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Display replacement service. Displays are used but in good condition.

If you damaged your display, I will replace the LCD for you.

If you damaged your display, I will replace the LCD for you.  LCD only, not the outer glass.

Mounting Tabs Broken? Power button gone? I will replace the bottom cover with a good used one.