# Quick Answer: What Happens If You Overcharge A Deep Cycle Battery?

## How often should you charge a deep cycle battery?

Batteries should be equalized occasionally to make sure each cell is equally charged.

Apply a controlled overcharge once every 30-90 days, or whenever individual batteries are imbalanced (reading a different voltage or specific gravity).

Check water level before initiating an equalize charge..

## What should a 12 volt battery read when fully charged?

So a 12volt battery will measure at about 12.9 volts when it’s fully charged and about 11.4 volts when it is fully discharged. That’s a total of 1.5 volts that represents the full range of charge on a 12volt battery.

## Can I leave battery charger on overnight?

Even though there is no risk of overcharging with the use of a high quality charger, the battery should not remain connected to the charger for more than 24 hours. A full charge is usually achieved by charging overnight. … Even after a deep discharge, some chargers enable at least partial reconditioning of the battery.

## What stops a car battery from overcharging?

When the battery voltage drops to around 13.5 Volts, the alternator will be turned on (connected to the battery). This will cause the battery to charge until it reaches around 14.5 Volts, at which time the alternator will be turned off (disconnected). That’s what prevents the battery from being overcharged.

## At what voltage is a 12 volt battery considered dead?

This is called the “open-cell” or “resting” voltage of the battery. Resting fully charged 12-volt batteries are around 12.8-12.9 volts, and flat dead ones are at 12.0 volts, so 12.4 volts on a resting battery means it’s about 50% charged.

## Is it safe to leave a trickle charger on overnight?

Otherwise, keep the battery charging until it is full. Some trickle chargers can safely be left connected for months without doing harm to your battery, providing an easy long term battery maintenance strategy. Others may only be left connected for a few days at most.

## Is it OK to leave battery charger on?

Do not leave battery in charger for more than a few days Subject to memory. Partial and random charge is fine; does not need full charge; lower voltage limit preferred; keep battery cool.

## Can I use a car battery charger to charge a sealed lead acid battery?

No, the car chargers current will likely damage your battery. … I however suggest charging the battery by connecting it to a constant voltage (13.8 volts for a 12 V battery). A bench power supply then can limit the charging current to 0.4A.

## Should you charge a new deep cycle battery?

New batteries should be given a full charge before use. New deep cycle batteries need to be cycled several times before reaching full capacity (50 – 125 cycles, depending on type). … Batteries should always be watered after charging unless plates are exposed before charging.

## What happens if you overcharge a 12 volt battery?

An overcharged battery will boil the sulfuric acid and distilled water mix. The casing of the battery can become hot to the touch, and begin to melt or swell. Flammable hydrogen can build up inside the sealed cells of the battery, causing swelling of the casing under pressure and seepage through small vents.

## How long will a deep cycle battery stay charged?

For example, if you have an 80-ampere-hour rated battery, then a load of four amps would discharge the battery in approximately 20 hours (or 16 hours down to the 20% level). New batteries can take up to 50 charge/discharge cycles before they reach their rated capacity.

## Can you overcharge a sealed lead acid battery?

Overcharging a battery causes hydrogen gas to be released. Sealed lead acid batteries can recycle the generated gasses as long as they are being overcharged at less than C/3. However, leaving the battery to be overcharged even at C/10 will corrode the plates if left on for weeks at a time.

## Should I charge my battery at 2 or 10 amps?

Consequently, when trying to charge a larger battery at that rate, it will take a very long time and the battery may discharge at a greater rate than the 2-amp charge can provide. It is better to charge a deep cycle battery at a higher charge rate like 6-amps, 10-amps or higher.

## Is a trickle charger good for a battery?

Trickle chargers are especially useful if you have an older car, a weaker or older battery, or just want peace of mind. Trickle chargers work by releasing a small amount of current to match a battery’s natural self-discharge rate to keep it topped up at its fully charged level.

## Can a battery explode if overcharged?

When overcharged, lithium ion batteries may overheat, explode and cause fires. Even slight overcharging reduces a cell’s discharge capacity, leading to overdischarging, which increases impedance and heat generation, and decreases cell lifetime.

## What happens if you leave a battery charger on too long?

A: If you leave the charger connected continuously, even at a mere 2 amps, the battery eventually will die. Overcharging a battery causes excessive gassing — the electrolyte gets hot and both hydrogen and oxygen gas are generated. … On sealed batteries, the buildup of gases could cause the battery to burst.