Yes, it’s possible. We suggest turning off the device before charging. Please note that charging via the supplied battery charger will enable much faster charging.
Please note that battery operating times may be shorter if used at low and negative temperatures.
Probably the battery has a deep discharge.
Keep the battery in the charger for a long time (up to several hours), remove and re-insert it. If the indicator starts blinking green, the battery is good;
if it keeps lighting red it’s defective. Do not use the battery!