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Posted on Jul 19, 2011
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I have 4 x 12v batteries 7ah each. if i put these 4 batteries together . how many volt and AH would this be. please reply . thank you

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Here you can read more about charging and connecting batteries in series or in parallel -
UPS Battery SLA Battery Replacement Batteries

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  • Posted on Jul 19, 2011
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It depends on how you connect the batteries. If you connect the negative of battery one to the positive of battery 2, the negative of battery 2 to the positive of battery 3 the negative of battery 3 to the positive of battery 4 then the positive of battery 1 and the negative of battery 4 will give you 48v 7AH. (This is known as connecting in series.)

If you connect the four positives together. Connect the 4 negatives together it will give you 12v 28 AH. (This is known as parallel connection.)

If you connect the negative of battery 1 to the positive of battery 2. Connect the negative of battery 3 to the positive of battery 4. Connect the positive of battery 1 to the positive of battery 3 and the negative of battery 2 to the negative of battery 4. You'll get 24v 14AH from the connection of the positive of battery 1 and battery 3, and the negative of battery 2 to battery 4. (This is known as series parallel connection)

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I have a aowa electric bike 48v 500w. the batteries are split into 4 12v 12ah. can i use a lower, lets say 12v 10ah battery or lets say 4 12v 9ah batteries?

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E300 electric scooter battery,

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Can you add 2-12 v 18 ah batteries in parallel to back up 2-12 volts 32 ah batteries?

hi, you mustn't do that ,,, you can get excessive current flow and that will damage the battery in question

Regards
Rob

www.gewizrepairs.co.uk
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I want to put 4 batteries together 4x 12v 7AH. and how many volts and AH would that be.

It depends on how you connect the batteries. If you connect the negative of battery one to the positive of battery 2, the negative of battery 2 to the positive of battery 3 the negative of battery 3 to the positive of battery 4 then the positive of battery 1 and the negative of battery 4 will give you 48v 7AH. (This is known as connecting in series.)

If you connect the four positives together. Connect the 4 negatives together it will give you 12v 28 AH. (This is known as parallel connection.)

If you connect the negative of battery 1 to the positive of battery 2. Connect the negative of battery 3 to the positive of battery 4. Connect the positive of battery 1 to the positive of battery 3 and the negative of battery 2 to the negative of battery 4. You'll get 24v 14AH from the connection of the positive of battery 1 and battery 3, and the negative of battery 2 to battery 4. (This is known as series parallel connection)
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Alarm and battery failure ; Powerware 9102

open the screws and disconnect the battery look the voltage written on it and AH (ampere/hour) e.g.12v & 7ah and purchase same value battery and connect look carefully the +ve &-ve polarity of battery and connect in proper way
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How do I know when I need to replace the battery

The only thing you will look out for is the specs of the battery. That is the voltage that it gives out. The size usually determines the hours it can provide power on a full charge.
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