- Fri Nov 18, 2011 12:09 pm #23081
Providing 3.7v with 1050 mah button cell as emergency battery. So when the regular battery dies of with charge. We can use the button cell for emergency battery pack up. Each button cell will last 5-6 hours once this battery is also dies we can replace with new button cell for emergency battery pack up. The button cell cost around 40-50 rs for each.