Battery choice 5AH+10AH or 15AH

[andyh2]

Just waiting for info on Ping battery availability to go with Tongxin kit. I can see advantages to getting 5AH and 10AH batteries. I could have a very good range with both and if in the future I put one together for my wife I'd already have battery and for shorter journeys I could save the weight.

But what I don't know is if there is any advantage to be had by having one larger capacity battery (other than not having to change over on a longer journey). Is there anything about a larger capacity battery that makes it more capable in any way, say in 'harder' working scenarios like long hills?

 

[Mussels]

Just waiting for info on Ping battery availability to go with Tongxin kit. I can see advantages to getting 5AH and 10AH batteries. I could have a very good range with both and if in the future I put one together for my wife I'd already have battery and for shorter journeys I could save the weight.

But what I don't know is if there is any advantage to be had by having one larger capacity battery (other than not having to change over on a longer journey). Is there anything about a larger capacity battery that makes it more capable in any way, say in 'harder' working scenarios like long hills?

A larger battery may benefit from not being discharged as much, leading to a longer life.

 

[flecc]

And a larger battery can give a marginally better performance since the battery cells do not chemically tire as much when under high load as in hill climbing.
.

 

[torrent99]

And a larger battery can give a marginally better performance since the battery cells do not chemically tire as much when under high load as in hill climbing.
.

As both Flecc and Mussels have said the 15AH is probably the better option.

Here's the theory. Every battery has a rating which tells you how much current it can deliver as a proportion of its capacity.

So a "1C" 5AH battery can deliver 5amps. At 2C it delivers 10amps and so on.
A 15AH battery at 1C will deliver 15Amps.

The higher the "C" the more strain on the battery...and the shorter the life.

In addition there's the DOD (depth of discharge). Discharging a battery 100% every time will lead to a much shorter charge than discharging only 33% of the charge.

So basically if you want a battery to last a long time get a big one and charge as often as possible...

 

[wotwozere]

Hi

I find if you go for the big ones you can go faster but not so far.

Go for the biggy if you can.

thx

Bob

 

[andyh2]

Thanks all, that's helpful. Big one it is then, if the prices and exchange rate don't interfere too much.