4 votes

Lead-acid battery charging: current not dropping

That does sound like you have a shorted cell. If these are normal flooded cell batteries, look in the individual cells for electrolyte level and bubbling. If one cell has significantly more ...
Peter Bennett's user avatar
2 votes
Accepted

Connecting solar cells directly to battery

From what I've read, the panels are supposed to match themselves to the voltage they are connected to, so even if they aren't at maximum efficiency they will be the correct voltage to the charge the ...
hobbs's user avatar
  • 7,320
1 vote

When wiring batteries in both series and parallel to increase the V and Ah, is there a difference between series-parallel and parallel-series?

Nomenclature. Your top example would be described as 2S2P first two cells in series and then this arranged as two parallel strings. The lower example would be 2P2S first two cells in parallel and then ...
RoyC's user avatar
  • 8,772
1 vote

Determine proper charger specs for a lithium-ion battery

Generally, everything charges safely at 1C. For your 2,800mAh battery, which is 2.8Ah, that means 1C is 2.8A, so make sure that your charger is 2.8A or less. Most generic USB chargers use a 1A or ...
MicroservicesOnDDD's user avatar
1 vote
Accepted

Improvement for system with two DPDT switches

There are four pole double throw switches available, but they may not be avialble with the current rating you require. You could use a single switch to control a 4PDT relay, or two DPDT relays, ...
Peter Bennett's user avatar
1 vote

Lead-acid battery charging: current not dropping

as above - you have a fault in the batteries - if Pb-acid and > 5 years old - throw them out -> new ones
pwrtrnx's user avatar
  • 11

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