maximum current limit that can taken out from a 9v dc battery

[SK Narwal]

can anyone tell me what is the maximum limit of current that can be taken out from a simple battery (any battery aaa, aa, c, d or lithium ion on any volts).
please help me guyz I m very confused.
:-?

 

[Audioguru]

The size, quality and type of a battery determines the maximum output current.
A cheap little Chinese carbon-zinc battery (labelled Super Heavy Duty) has a very low maximum output current. A larger one has more current and can produce it for a longer duration than a small one.

Some Lithium Ion battery cells have a "protection circuit" inside that limits their maximum discharge current.

The Lithium Polymer batteries used for my electric radio controlled model airplanes are small, are not protected and can supply very high current.

The datasheet for an ordinary 9V alkaline battery shows that it can produce 400mA for about 42 minutes when its loaded voltage has dropped to 6V. A Lithium 9V battery can produce 500mA for 84 minutes when its loaded voltage has dropped to 6V.

 

[D.A.(Tony)Stewart]

If a battery gets hot it ages quickly. If oozing hot some can explode. Thus charge capacity and internal resistance determine I^2*ESR=P loss and thermal conduction and cooling are affected by size or deg/W.

Thus each battery is unique but 1W internal loss is enough to cause slow heat rise and 5W is 5x faster .. And thus most damaging.

There will be a power limit for each battery size for self losses and you may download specs for max sustained current which is related to internal losses.

For a 1.5 V battery that drops from 1.6 to 1.3V with 1A , we get Vdrop*I= 0.3W which is safe. Meanwhile the output load is 1.3W is irrelevant but that ratio is an indication of the impedances.

 

[Audioguru]

Hot battery?
A woman was giving a speech. She began jumping and screaming. She had a 9V alkaline battery in her pocket as a spare for her wireless microphone and it was shorted by her keys or some coins. The shorted battery got hot and was burning her. It was an Energizer brand battery so it didn't leak like the Duracell brand would.