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Battery Chargers

A battery charger is a device used to put energy into a rechargeable battery by forcing an electric current through it.

The charging protocol depends on the size and type of the battery being charged, it follows a 3-stage charging scheme:

The first stage is referred to as “bulk”; the charging current will be held high and constant and is limited by the capacity of the charger.

When the voltage on the battery reaches its outgassing voltage the charger switches to the second stage, the “absorption” stage and the voltage is therefore held constant.

In this third stage called the “float” stage, the charging current is very small. At this voltage the battery can be maintained at full charge and compensate for self-discharge.

To choose the ideal charger for your battery, you must first select the right input voltage (120V,230V etc...) and a suitable charging current. It should be at about 15~20% of your battery capacity for lead batteries (e.g. for a 100 Ah battery, an appropriate charging current would be 20 A). You can go up to 30% for Lithium batteries with a compatible charger.

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