LED rechargeable desk lamp the internal rechargeable battery, charging voltage is how old?
Rechargeable led desk lamp voltage specifications have two ways of blunt electricity ah. If is plugged into the USB charging cable is 5 v. Battery voltage is 5 v. The product brand of # charging desk lamp is such specification.
Charging voltage high, will affect battery life; But some desk lamp is 6 v or 9 v battery. So it is best to open it, take the battery voltage shall prevail.
Now that can tear down, can directly measure the voltage across the battery is generally a little more than 3 V, with USB 5 V charging slightly larger, it is best to 4 V or 4.2 V of mobile phone chargers.
