Tony Kenny Posted October 31, 2017 Share Posted October 31, 2017 I'd like to make up a 6S from 2 3S batteries, but still have the 3S individually to use in other models. It's been 25years + since I studied, so are Lipos just going to be the same as any other bettery and I can just connect 2 in series with a custom cable and they'll be fine, or are lipos something a bit more sensitive? Quote Link to comment Share on other sites More sharing options...
Adrian Smith 1 Posted October 31, 2017 Share Posted October 31, 2017 Tony, I regularly create a 12S Lipos set up by connecting up in series (not parallel more importantly) two 6S Lipos. Just remember it depends what you want to do i.e. double battery voltage or double the power capacity which governs whether you wire them in series or alternatively in parallel. I am lazy though, as I bought a custom made lead, but many of our number do it themselves. Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted October 31, 2017 Share Posted October 31, 2017 The important thing to bear in mind is that both batteries need to be similar capacities and condition/charge state before flight or you could encounter a situation where one is discharged to the point of damage before the overall pack voltage drops to a level that's noticed by the pilot or ESC. Quote Link to comment Share on other sites More sharing options...
Tony Kenny Posted October 31, 2017 Author Share Posted October 31, 2017 Thank you, I made this up in a few minutes this evening. Creates quite a spark when it connects which took me by surprise, but in hindsight, I should have fully expected that. I'm using identical pairs of 3S 2200mAh, same manufacturer so they're as close as they're going to get. Put them on my Dynam Smart with a power meter giving a whopping 900W of power with only about 36A. With a flying weight of about 1.8kg, it's not going to need a lot of throttle when I'm using these packs. By the way, the reason for this exercise isn't the power, it's just so I have more packs on a day flying instead of buying more 4S (yes the ESC/model can take 6S). Quote Link to comment Share on other sites More sharing options...
Old Geezer Posted November 1, 2017 Share Posted November 1, 2017 I'm doing the same with 2 x Turnigy 3S 3000s - cheated though, bought the "In Series" connectors from HK along with the LiPos. Loads of oomph to fly my Toledo Special, but can split 'em and get two flights out of the Pulse 25e! Quote Link to comment Share on other sites More sharing options...
Adrian Smith 1 Posted November 1, 2017 Share Posted November 1, 2017 Tony, I would put an anti-spark connector somewhere in the circuit if only to save your connectors. Quote Link to comment Share on other sites More sharing options...
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