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Grisen

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Reply with quote  #1 
Hi.

Can someone tell me if i can run a battery with these specs on the MK2 CRB or will it be too much?
Have been looking at the forum but cant find any regarding the MK2 CRB.

If not then how would a 11.1v 1300mah 20c or a 11.1v 1100mah 25c?

Best regards.
Grisen
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Kraken_Wrangler

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Reply with quote  #2 
You take milliamp hours(mAh), convert to amp hours(/1000). Multiply it by the suggested "C" rating (this is the rating for continuous discharge). The answer is the maximum amperage the battery can punch out.

mAh/1000*C= amp

1300/1000*20=26 amp

1100/1000*25=27 amp

1450/1000*30=43.5 amp

Will it run? Sure.
How long will it run? Not sure. 43.5 amp is more than two times the rating for the stock Krytac fuse (20amp).

I can't recommend the battery because any damage caused by it would be outside your warranty protections.
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Grisen

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Reply with quote  #3 
Hi. 

So then im down to these 2 batteries.
The 1400mah comes out with 21amps will this blow the fuse or can i swith to an 30 amp fuse?

https://hobbyking.com/en_us/turnigy-nano-tech-1200mah-3s-15-25c-lipo-airsoft-pack.html
https://hobbyking.com/en_us/turnigy-nano-tech-1400mah-3s-15-25c-lipo-airsoft-pack.html

Thanks
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Kraken_Wrangler

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Reply with quote  #4 
the 20amp fuse has some leeway, you should be fine with a battery that has slightly higher amperage.

My worry is a lot of gel-pack battery sellers love to fudge the C-ratings on their batteries. This is why you see this brand write "15-25c"

So what is it? 15 or 25c? Those are two very different numbers with vastly different discharge rates. It's kind of dishonest if you think about it. Problem is there is no standard on how to make the gel-pack battery. Many battery sellers don't even know what they're selling. That's why they can't give you a straight answer.

There are other companies like Tenergy, Titan, and Valken that have released 18650 cell based batteries. What's nice about these batteries is there is a standard. And usually they will publish the true rating because these cells can have sub-manufacturer data from giant reputable brands like Panasonic, Sanyo, Sony, and Samsung. Mind, there's only four legit manufacturers of 18650 cells in the world. They are Panasonic-Sanyo, LG, Samsung, and Sony. Any other cell is usually made by contract, or from leftover batteries that did not meet the QC standards to those five names.

Something like this probably uses a low discharge, high mAh Panasonic battery.

I've been especially impressed with Valken's use of Samsung 25r cells in some of their batteries. This is a very reliable cell that has a good performance and very tolerant to abuse. You can even find published datasheets for Samsung 25r batteries.

I use them in flashlights and camera equipment. I wouldn't be surprised if they are used in my laptop or cordless drill.

Other things to think about: Reputable companies actually QC their product. They inspect and know what's in the cells. They will buy product insurance. This way if the product goes south on the customer. The customer can go back to the company and get compensation for damages or injuries. Some Chinese companies don't do this. They will laugh in your burnt crispy face.
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