thunder Show full post »
thunder
Despite the manufacturer of Titan batteries assuring me in an email that in june this year I will be able to purchase Titan batteries from a UK stockist it just hasn't happened,and the titan battery that I have got was shipped from usa at a ridiculous cost,that is why I only have one. I can get 10 mins of flight time with titan battery on my trex 450 so am pretty sure that cells are ok,the battery has been put back into storage and I am instead using 4s4000 multistar lipo for my tricopter FPV,,,,thanks everybody for your comments.
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Grantman
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Just be sure that both batteries are exactly the same, and not two different manufacturers, or types.. Even slight differences can be trouble. Lithium Polymer is not the same as other rechargeable batteries either..Crash and burn is not a pleasant sight...

This is misinformation. Battery manufacturers will specify this to get you to buy only their batteries.
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Argonath
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Just be sure that both batteries are exactly the same, and not two different manufacturers, or types.. Even slight differences can be trouble. Lithium Polymer is not the same as other rechargeable batteries either..Crash and burn is not a pleasant sight...


The only thing you need to make sure is the same is the voltage and C rating. Nothing else. You can put 2 different MaH rated batteries in parallel no problem but you have to have the same voltage rating (3S, 4S, 5S, etc) and the Discharge or C rating should be the same on both batteries (30C, 35C, etc)

for example you can put a 1000Mah 3S 30C battery in parallel with a 5000 Mah 3S 30C battery and should not have any trouble. They discharge at the same rates when under load.

The only thing is, you will run your lower mah rated battery dead long before the higher rated one and can ruin the lower rated battery.

Optimally they should be the same or as close as possible in mah, cells and C rating. They do NOT have to be from the same manufacturer.
D.I.L.L.I.G.A.F.
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quorneng
When in parallel will you actually discharge the smaller capacity battery before the bigger one?

LiPo do have a voltage discharge curve so provided the cells have the same true C rating (and the wiring has the same resistance) they will have at the same % discharge level all the time. The smaller battery will simply provide a smaller proportion of the total current.
But it much better, and safer, to use 'matched' batteries of the same capacity.
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Skydiver
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This is misinformation. Battery manufacturers will specify this to get you to buy only their batteries.

What I meant was that there ARE slight differences, to avoid patent suits, just like Colt and Smith and Wesson made like products but with slight differences to avoid patent infringement.. I have an electronic engineering background to back this up. Slight differences in composition to be able to prove liability is why these differences exist..(example), Why does the cylinder on a Colt revolver rotate opposite of a S/W ? Just in case!!
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thunder
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What I meant was that there ARE slight differences, to avoid patent suits, just like Colt and Smith and Wesson made like products but with slight differences to avoid patent infringement.. I have an electronic engineering background to back this up. Slight differences in composition to be able to prove liability is why these differences exist..(example), Why does the cylinder on a Colt revolver rotate opposite of a S/W ? Just in case!!

Thanks for your comment,the Titan battery is now in storage and I am now waiting for the company to start selling Titan batteries within the UK.
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thunder
Thanks folks for all your comments and suggestions.
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Skydiver
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Thanks for your comment,the Titan battery is now in storage and I am now waiting for the company to start selling Titan batteries within the UK.

Surely, one battery may discharge faster than another even though they may have the exact same rating.
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