Cliff Bastow Posted March 17, 2019 Share Posted March 17, 2019 Hi all, I have a twin electric model that needs quite a lot of weight in the nose so I thought I might as well fit in a second battery as there is room and I might as well make use of the extra weight. I want to use 2 batteries as all my models use 3s 2200 batteries and I do not want to buy larger ones just for this model. My question is this, is it better to keep the batteries separate, ie one powering each motor or wire them in parallel so in effect it makes a 3s 4400 battery and run both motors off it? My thinking is the latter as if they were separate and one battery ran down before the other for any reason i would then get asymmetric thrust but I am by no means an expert. Thoughts please? Cliff. Quote Link to comment Share on other sites More sharing options...
John Rudd Posted March 17, 2019 Share Posted March 17, 2019 Running in parallel gets my vote..... Quote Link to comment Share on other sites More sharing options...
Piers Bowlan Posted March 17, 2019 Share Posted March 17, 2019 Gets my vote too, although I have never tried it! Not so keen on the idea of parallel charging however but I know many on this forum do so routinely. Quote Link to comment Share on other sites More sharing options...
Cliff Bastow Posted March 17, 2019 Author Share Posted March 17, 2019 I wont be charging the batteries together, just using them in the model, By the way they will both be the same make and spec. cheers Cliff. Quote Link to comment Share on other sites More sharing options...
Alan Gorham_ Posted March 17, 2019 Share Posted March 17, 2019 I've done it a few times with no ill effects. I've always used packs bought at the same time and I keep an eye on the internal resistance of each pack as they age. I've done it on my Halifax for 14 years and my Beaufort for 12 years so it's fairly well proven.... Quote Link to comment Share on other sites More sharing options...
Former Member Posted March 17, 2019 Share Posted March 17, 2019 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Cliff Bastow Posted March 17, 2019 Author Share Posted March 17, 2019 Thanks for the advice guys, that is basically what I thought. Lovely models by the way Alan, especially like the Beaufort. Cheers Cliff. Quote Link to comment Share on other sites More sharing options...
Former Member Posted March 17, 2019 Share Posted March 17, 2019 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted March 17, 2019 Share Posted March 17, 2019 At one time it was common practice for battery makers to assemble packs in parallel - designations such as 4000 4s2p denoting a pair of 4s batteries paralleled together (with the balance leads also connected in parallel internally coming out as a single lead/plug). I have 2 4000mAh Rhino packs configured as above which are donkeys years old and have seen very regular service in a model used as my go-to hack for most conditions - they still give over 3600 mAh with plenty of reserve after several hundred cycles (I habitually fly them in a telemetry equipped model which alarms at this point although they are still producing good power) so parallel charging does not appear to have harmed them at all. Quote Link to comment Share on other sites More sharing options...
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