The most suitable batteries for 4x5V motors 1.2A

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For powering four 5V motors with a nominal current draw of 1.2A and peak current of 3A, rechargeable NiMH batteries are recommended due to their safety, ease of charging, and cost-effectiveness. A suggested configuration is to use five AA NiMH cells, providing a total of 6V, which aligns with the motor requirements. While some users consider using two LiPo cells for increased capacity, this necessitates modifications to the wiring and charging setup, as LiPo batteries can be more hazardous if not handled correctly. The discussion also highlights the importance of ensuring compatibility with the PWM controller's voltage needs. Overall, starting with the recommended NiMH setup is advisable for reliability and simplicity.
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Hello,

I'm looking for rechargeable batteries for 4x 5V motors of nominal current draw 1.2A and peak current up to 3A to power my robot.
I'm wondering about http://www.ebay.com/itm/2x-3-7V-18650-UltraFire-Li-ion-6800mAh-Red-Rechargeable-Battery-for-LED-Torch-/111653427442?pt=LH_DefaultDomain_0&hash=item19ff1018f2, http://www.ebay.com/itm/6x-AA-3000mAh-1-2-V-Ni-MH-rechargeable-battery-BTY-cell-for-MP3-RC-Toys-Camera-/200859881013?pt=LH_DefaultDomain_15&hash=item2ec42e8e35 batteries or http://www.ebay.com/itm/3-7V-6000-mAh-Polymer-replacement-Lipo-Li-battery-For-GPS-ipod-Tablet-PC-3691155-/181640906205?pt=LH_DefaultDomain_3&hash=item2a4aa445dd batteries.
It should be price friendly.
What is you opinion?
 
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What sort of motors? Are they servo motors that have electronics in them that needs 5V ?
 
Do you have a charger already? What can it do?
 
They are PWM controlled mitors of my robot rover. I already have this simple linear charger: http://m.ebay.com/itm/5V-Mini-USB-1A-TP4056-Lithium-Battery-Charging-Board-Linear-Charger-Module-Cute-/331434903432?nav=SEARCH
 
=SJ= said:
They are PWM controlled mitors of my robot rover.

Ok what voltage does the PWM controller need?

That charger board will only charge one Lipo cell at upto 1A. (It won't charge NiMH cells). If you plan on using two Lipo cells in series you will have to reconfigure them for charging.

You can get this to work but I hesitate to give advice as messing with li batteries can be dangerous if you don't know what you are doing.
 
What I would do is join the forum at the top of this page..

http://www.dfrobot.com/index.php?route=product/product&product_id=97#.VaPesmdRHmR

On the "shipping list" and in this vid ...

https://opensourcehardwaregroup.com/assemble-dfrobot-pirate-4wd-mobile-platform/

..they mention a 5 * AA cell holder so it looks like the platform is designed for 5 NiMh cells (5 * 1.2V = 6V) or 5 Alkaline Cells (5 * 1.5V = 7.5V).

I think I would start with the recommended battery holder and 5 AA rechargeable NiMH cells as they are easy to charge, safe and reasonably cheap. If you want more capacity (more run time) ask on one of the forums what others are using. They probably use 2 Lipo cells (2 * 3.7V = 7.4V). However the wiring will need to be modified to suit your charger. The one you mentioned is for a single cell not two in series.

Also mentioned on the shipping list is a "PH-2.0 to DC-2.2 adapter". I don't know what that is but it sounds like might be some sort of DC-DC Voltage converter. You might want to ask on their forum what that is for.
 
I was wondering about NiMH at the first time but I was advised that my current draw is 0.8C whilst normall battery likes up to 0.2C. At the moment I use Alkaline cells but it is depleted within unreasonably short period of time. On the other hand Lipo seems me as overkill for my project.
 

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