The former can be charged, the latter cannot be charged. When charging, be sure to use the charger that matches the charging treasure, use the 9v2a charger to charge the 5v2a charging treasure, light damage to the charger and charging treasure, heavy cause combustion explosion accident, because the lithium battery is sealed, high temperature and high pressure gas can not be released, it will explode, which is different from the lead-acid battery, lead-acid battery is a vent.