Linked Questions

0
votes
2answers
532 views

do mAh on batteries (for home-use - nerf) make a difference? [duplicate]

I was wondering if the mAh on an battery pack is important or relevant, so you would recognize a difference? Little bit Off-Topic: I've read a lot about "Nerf voltage mods" where modders change the ...
0
votes
2answers
64 views

Will a standard 9V alkaline battery (300mAh- 400mAH) be able to supply 2.5A for 5-10 second at a time? [duplicate]

For example, I have a motor that needs a surge of 2.5A for a short amount of time from a 6V power supply. Will any 6V battery able to supply that current? Even if let's say it has only a 500mAH. How ...
20
votes
8answers
80k views

How bad is it to undervoltage a 12-volt lead-acid battery?

I had a heated discussion with a few colleagues today revolving around how low of a voltage was alright for 12 volt lead-acid battery; they were in the opinion that the low voltage warning buzzer and ...
11
votes
2answers
2k views

How much current can lead acid batteries safely supply?

I have a motor I wish to drive with an 18V lead acid battery. The motor can draw quite a lot of current when stalling and I am worried of overdischarging the lead acid battery. Unlike LiPo batteries ...
2
votes
5answers
8k views

Which wire gauge for a 250 amp source?

I have no real experience with this stuff... I have two 6V 220Ah DC golf cart batteries that I want to put in series to make a 12V 220Ah output that I will connect to a 3000W power inverter, my ...
3
votes
3answers
644 views

What do i need to get this motor running off a car-battery?

I'm going to build a motorized barn-door mount for astrophotography, but have ABSOLUTELY no experience with motors, circuits or anything else related to the motor. This is the motor I bought: https:/...
-1
votes
4answers
2k views

Battery mAh meaning

What exactly does mAh rating means? I know that it means the milliamperes supplied by the battery in one hour but i need a more conceptual and practical definition/example. How does mAh rating tell ...
1
vote
1answer
943 views

Lead Acid max discharge rate?

I am building a flashlight using a large(ish) 35W HID headlamp from a car, and I'm having troubles choosing a good battery technology. The inverter draws about 3.5A - 4A at 12V, tested on a large ...
0
votes
2answers
412 views

Replacing sealed Pb battery with car battery

I found a 2U server UPS by APC, that uses 4 sealed Pb batteries (12V 9Ah, 2 in series, 2 times in paraler, so the pack is 24V). The batteries are totaly dead (after 8 hours of charging, they roughly ...
3
votes
2answers
109 views

Battery ratings; am I reading this correctly?

I apologise if this insults anyone's intelligence, but I've always believed the only stupid question is the one you don't ask, so here goes... As a bit of background, I asked previously about ...
1
vote
1answer
31 views

Confused about battery rating specifications

I'm confused about how to understand battery capacity by its ratings. I though I understood Amp-Hours, as a nominal rating where they usually specified a period of time where that rating was ...