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I just got my brand new LiPO battery charger. It is require 12 volt pover supply. I saw people are using car battery, pc power supply to this charger 12 V. but i'm not sure about current it is require.

$ 4 button LiPO battery charger / balancer

Here is spec:

Operating voltage range: 10.0~18.0Volt
Circuit power: max.50W for charging, max.5W for discharging
Charge current range: 0.1~5.0A
Discharge current range: 0.1~1.0A
Current drain for balancing Li-po: 300mAh/cell
NiCd/ NiMH battery cell count: 1~15cells
Lithium battery cell count: 1~6Series
Pb battery voltage: 2 to 20V
Dimension: 135×100×40mm 

Will it be ok if i use for power supply plug in transformer which outputs 12 VDC, 800mA?

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Dont wanna damage any of them.

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closed as off topic by Kortuk Jun 21 '12 at 22:47

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  • \$\begingroup\$ To get close to the performance of the charger, you'll need a 5 A power supply. The calculation is simple P=V*I. Here P=50 W and I've used V=12 V and added a bit of safety margin. \$\endgroup\$ – AndrejaKo Jun 18 '12 at 15:03
  • \$\begingroup\$ Consumer electronics support is off topic. I realize you are working hard to find a power supply for your unit you purchased but there is no design here. The focus of this is picking a cheap power supply. \$\endgroup\$ – Kortuk Jun 21 '12 at 22:48
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Your plugin transformer outputs 800mA, your charger has 50W output max at 12V.

50W / 12V = 4.17A

Transformer you have is too weak for this. PC PSUs have output somewhere in range of 10A on 12V rail, that's why they can be used.

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  • \$\begingroup\$ Will power supply (Transformer) burn if i use them together? \$\endgroup\$ – Pol Jun 18 '12 at 15:19
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    \$\begingroup\$ it could burn, it all depends on a design of charger. \$\endgroup\$ – miceuz Jun 18 '12 at 15:25
  • \$\begingroup\$ @Pol: take no chances and look for a PC PSU. Virtually any PSU will do the job, so you will be able to get one for free if you look in the right places. There are also a lot of tutorials on the web how to run a PSU without a mainboard attached. \$\endgroup\$ – 0x6d64 Jun 18 '12 at 15:32
  • \$\begingroup\$ What about notebook power supply? Is it to powerful for this charger? It shows 10.0~18.0Volt operating voltage range. I thing notebook charger would do the job. How go think? \$\endgroup\$ – Pol Jun 18 '12 at 15:56
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    \$\begingroup\$ it depends on the charger, if it traks available power source, it might work with less performance, otherwise, it will melt your power supply. \$\endgroup\$ – miceuz Jun 18 '12 at 16:11
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So, I tested yesterday. I't is working perfectly with 12 VDC, 0.8 A power supply. Actually i have 2 more one is 12 VDC, 2 A and another one is 12 VDC, 1.5 A. But they have different input plug. So i could not test them.

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    \$\begingroup\$ No, it's not working perfectly. Sooner or later you are going to damage something or start a fire. If you're extremely lucky, you're just limited to about 10 watts of power for charging instead of the 50 watts the charger can output. This is VERY DANGEROUS. \$\endgroup\$ – Bryan Boettcher Jun 19 '12 at 18:47
  • \$\begingroup\$ Id does not even heat the power supply. \$\endgroup\$ – Pol Jun 19 '12 at 19:31
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    \$\begingroup\$ You're still playing with fire. You said specifically "dont want to damage any of them", several people have said you must have a larger supply and given you reasons, you ignored it and did it anyway, and are on borrowed time for one of these devices. \$\endgroup\$ – Bryan Boettcher Jun 19 '12 at 19:44
  • \$\begingroup\$ I'm steel looking for something more appropriate. \$\endgroup\$ – Pol Jun 20 '12 at 5:08
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    \$\begingroup\$ Spend literally a dollar more and find one that's a minimum of 5A. 10A would be safest. \$\endgroup\$ – Bryan Boettcher Jun 20 '12 at 5:36

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