... a. OEM & ODM service available b. li-battery rechargeable c. 6-8 hours with warmth d. self- ... with special power adapter and 3.7 V li-battery, the input voltage of the product is only 5 ... of high capacity of li-battery, and the unique design of itis the invisible battery area, which is very ... computer, too. It also can use mobile power (li-battery) to supply outdoors, which can keep continuous usage 3 ...