Flooded Batteries Vs VRLA Batteries Difference Between Conventional Flooded Batteries And VRLA Batteries

Difference between conventional flooded batteries and VRLA batte r ies: As you alread learned about what is a VRLA battery, charging, storage, Installation VRLA batteries, this post explains on conventional flooded batteries Vs VRLA batteries.

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Conventional Flooded Batteries Vs VRLA Batteries

Sl no	Conventional flooded batteries	VRLA batteries
1	Constant current charging method is normally used for charging these batteries.	Constant voltage with current limiting method is the recommended for charging these batteries.
2	As excess of free acid is available. Hence electrolyte stratification takes place. To maintain uniform specific gravity of electrolyte equalizing/extended charging is required.	As there is no stratification of electrolyte, no equalizing charging is required
3	Frequent topping-up of distilled water and acid is required since equalizing/extended charge method is used which results in loss of water	Under normal recommended operating conditions there will no loss of water. Hence the periodic topping- up is not required if the voltage, current, ripple and regulation are in specified limits.
4	Post corrosion is observed due to acid mist.	No post corrosions in normal operation since there is no acid mist.
5	These batteries are needed to be placed only vertically since they required frequent topping-up with distilled water and can lead to spillage’s as free and floating acid is present inside the battery	The batteries can be mounted in any position (normally horizontal position is recommended) since they do not require any periodic topping and are both spill and leak proof.