# Battery management during use

When in use, the MX-1502 only starts to charge the hosted device's battery if the battery's state of charge reaches 35%. The MX-1502 only recharges the hosted device's battery to a maximum of 70%.

Note: This is true only if the MX-1502 itself has over 750mAh of battery life left (about 25% when just using the flat pack battery, or about 13% when using both a flat pack and pistol grip battery). If the MX-1502's charge drops below this 750mAh threshold, the MX-1502 does not charge the phone.