The new Solo770 Battery Baton is a higher capacity version (3000mAh) of the Solo760 (2200mAh). It allows greater efficiency on site as it gives more tests per battery, for the same charge time as before but provided by the new Solo727 charger.
To help match the battery to the charger, a red sleeve has been added to the Solo727 Charger (on the battery lead) which corresponds to a red collar on the top of the Solo770 battery baton. The Solo770 battery baton should have a life expectancy of 2 years or 500 full charges. You will be able to see when the baton is on its way out as will require constant charging.