Is It Better To Drain Battery Before Charging. Depending on which exact Lead-Acid battery you have end of life discharge voltage for a nominal 12 Vdc battery 6 cells ranges from 105 Vdc to 115 Vdc. Similarly charging your battery to full and keeping it plugged to the charger all day can make the battery corrode faster.
Leaving your phone on the charger all night or all day is far better for your battery than running it down and charging it up. To avoid this phones have elec. If you charge it before it stops draining.
If you think your devices battery gauge is wrong deep cycling full discharge then charge will help reset it but otherwise Lithium Batteries are happiest when they are not fully drained.
Charge your Apple lithium-ion battery whenever you want. Depends on the battery. Is it bad or good for one to let iPhone battery fully die before charging again. Leaving your phone on the charger all night or all day is far better for your battery than running it down and charging it up.
