Is It Better To Drain A Battery Before Charging

No thats actually a bad idea.

Is it better to drain a battery before charging. Depends on the battery. Avoid draining your battery to zero. Theres no need to drain it down or risk your battery dying on you at a crucial moment.

That means deep-discharge cycles are not required. Lithium-ion batteries dont respond well to being charged all the way up and then run all the way down. Of charge cycles it can withstand before.

Similarly charging your battery to full and keeping it plugged to the charger all day can make the battery corrode faster. The lithium batteries used in modern phones are stressed by deep discharge. Then as a battery is floated kept on the charger with a charge applied to keep it up to a reasonable level it should never exceed 138 volts.

You can charge when its at 40 and disconnect when it reaches 80 or any other values without hurting the phone. To find out which type of battery your laptop uses simply remove it from the laptop and take a look at the label. A resistor connected across the cell until it is dead.

Answer 1 of 5. In fact its better for the battery to use partial-discharge cycles. Today most batteries never truly fully discharge.

Nowadays lithium ion batteries are the most common and they are more convenient because you do not need to fully discharge them before charging. The cells can actually be permanently damaged by one truly complete discharge eg. It could cause mechanical degradation of the cathode or side reactions with the electrode.