led continue on from the start when i charge it

i bought the JB Tarah from my friend without charger. he lost it. when he handed the set, the battery is 20%, i know from the voice when it turn on. however, at that level of battery, i can connect it even though i my android phone detect it when bluetooth is on. i though that it happen because the battery is low. then i bought the new charger, and it took about 5 days before the charger arrived. i charge immediately after i received the new charger. at first, the led flash for a while. and then turn off. at that time, i use my xiaomi charger head. more than 3 hours the led is off. i released it from the cradle, and tried to turn on the device. but failed. i did it several time. but failed. one week later, i put the device in cradle and the led is turn on for a while and turn off shortly. but now, i just let the device in the cradle and pluged it into my laptop. about 15 minutes later, the led is on, but is not flashing. i try to turn on the device, but failed. and the i put the device in the cradle again and let it being charged for a while. but still, i can not turn on the device. after one hour of charging, it still can not be turned on...