charging of batteries

Replies

• 

  reachrkata

  It is dangerous to connect the power supply directly to your battery. The current may be so high that the battery may overheat and get destroyed.
  Check the datasheets of the battery. There will be a maximum charging current specified. Using some circuit (like constant current sources) ensure that this current is not exceeded.
  
  -Karthik
• 

  Codex Guides

  I would not recommend trying to charge lithium-based batteries without a charging controller. The batteries have a good chance of exploding or venting toxic fumes. As Karthik said, it's possible to overheat the batteries. Lithium-ion batteries may explode; lithium-polymer batteries may catch fire or vent toxic fumes. I've seen both, so it can and does happen.
  
  The best option is to pick up an inexpensive lithium-ion charge controller IC and use that to moderate the charge voltage/current to the battery or battery pack.
  
  Having said that, if you're careful, you can do it. But the applied charging voltage and current must be in the right ranges. If the voltage or current is too low, you won't charge; if it's too high, you will damage the batteries (and maybe yourself).
  
  Check out this link for more information: #-Link-Snipped-#
  
  What you're doing could also be done with nickel-cadmium, nickel-metal-hydride, or lead-acid cells, IF you are careful and don't try and charge too fast. They are slightly less picky than lithium-based cells, but you can still cause damage.
  
  Whatever you do, don't try and charge them FAST this way! You should be thinking about a two-to-eight hour charge rate, not a 15-to-60 minute rate.
  
  - CG
  #-Link-Snipped-#
• 

  KAPILBEC

  I DON'T THINK THAT THE CAPACITY OF THE BATTERY LL REMAIN SAME THE TOTAL CAPACITY OF BATTERY LL BE 5600mH
• 

  reachrkata

  Nope, Batteries in series retain the Ah rating, and batteries in parallel retain the voltage rating.
  
  - Karthik
  😁
• 

  Ashraf HZ

  As Codex said, it would be a lot wiser to invest in a lithium battery charge controller. Not only will you need to moderate the current, you'll need to make sure each cell is charged somewhat equally if they are connected to each other.