Battery specification and charging

[vasanth kumar]

hello,
i bought a battery before 6 months. it is specified as 12v, 1.3ah/20HR. what does this specifications mean?. and kindly explain me how to recharge this battery to meet long life. thanks.

 

[tpetar]

Its deep cycle C/20. You will get declared capacity (maximum performace) of 1,3Ah if you maximaly discharge battery with C/20 0,065A (65mA) in 20h duration. There is no 1,3A in 1h discharge!!!.

Read manufacturer datasheet about your battery model, you will find all needed data there.

For long life cycle battery for max 30% in other words use battery as float power source and avoid complete or deep discharge to 10,5V.

Charging voltage for single charging cycle should can be up to 14,4V, and for float charge voltage 13,5-13,8V. Of course manufacturer recommendations and suggestion is on first place.



:wink:

 

[jdwaverly]

The previous responder assumed your battery is a lead acid battery. 1.3ah seems VERY small for a led acid.

My answer: Each type of battery, NiCd, NiMh, Lipoly, etc has VERY specific charging requirements that must be met. Some work best with constant voltage charging, others constant current and others can
explode if charged incorrectly. You need to specify the exact battery type to help us determine its needs.

 

[tpetar]

The previous responder assumed your battery is a lead acid battery. 1.3ah seems VERY small for a led acid.

My answer: Each type of battery, NiCd, NiMh, Lipoly, etc has VERY specific charging requirements that must be met. Some work best with constant voltage charging, others constant current and others can
explode if charged incorrectly. You need to specify the exact battery type to help us determine its needs.

He say 12V 1,3Ah, also lead acid exist with that smaller capacities. Almost every manufacturer of sealed lead acid batteries have smaller range of batteries, I supose you know that. :smile:

Often people links lead acid with big car starter batteries 10-15kg, and accepts that lead acid must be big in size.



Look catalog in attachment, you will find 12V 0,8Ah battery inside (capacity declared for C/20).




;-)

 

[jdwaverly]

tpetar,
I understand your reasoning. But as a pedantic engineer I never like to assume anything.
All the best

 

[tpetar]

tpetar,
I understand your reasoning. But as a pedantic engineer I never like to assume anything.
All the best

Of course, I support that. Better is to have all datas and specifications which we dont have from first post, but with expirience we make conclusion that battery with 12V exist only as lead acid, there is no NiMh or Li-Ion / LiPo batteries on 12V. Also and 12V lead acid can be considered as some kind of battery pack with 6 cells inside. We should not mix battery pack with battery, if we wants to stay pedantic. Everything is possible, maybe thread owner means on battery pack, maybe I'm wrong. ;-)