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We've all seen questions having to do with a single large-capacity LiPo vs two smaller-capacity LiPo packs in parallel, with the same number of cells. We've also seen questions having to do with a single LiPo vs two LiPo packs in series of the same capacity, but half the cell count. This is a question of similar nature...but, at the same time, completely different.
I have the TFL Jet Boat, which comes with a single battery tray, centered directly in front of the motor. The ESC & servo are on the port side, while the Rx is on the starboard side. This causes the Jet Boat to be somewhat unbalanced, with greater weight on the port side (as most probably know, the TFL Jet Boat is not "self righting"). As such, I'd like to 'correct' the balance problem...and, I have an idea on how to do so.
My idea involves moving the ESC to what is currently the battery tray, and then installing two new (and smaller) battery trays, one on each side of the ESC (the Rx would remain on the starboard side, as its weight is almost equal to the weight of the servo on the port side). Although not a perfect 50-50 left/right balance, it would be about as close as anyone could ever get without adding weights. So, what's my question?
In switching from a single LiPo, to two LiPo packs, I have two options. For the purpose of the following examples, let's assume I want a total capacity of 6000mAh. On one hand, I could use two 2S 6000mAh packs in series. On the other hand, I could use two 4S 3000mAh packs in parallel. Obviously, both equate to 4S 6000mAh...but, what I'd like to know is, is one solution better then the other? For example, would one run cooler than the other? Does one provide greater "punch" over the other? Does one less battery sag when accelerating from a standstill? Does one provide less ripple? Or...should I leave it as it is, with a single LiPo centered in front of the motor (even though it causes the boat to be unbalanced)?
In answering, it might also help to know that I'll be replacing the stock 120A ESC with the OSE Raider 150A, and the stock 1620kv motor with a lower kv motor (probably in the 1300-1400kv range). Until now, I've always run the stock electronics on 3S, thus why I'll be going with a lower kv motor. When it comes to something like hydro, where low COG makes a huge difference, two 2S in series is the better way to go...but, with a mono like the TFL Jet Boat, I honestly don't know, thus the reason I'm asking for advise.
~ More peace, love, laughter, & kindness would make the world a MUCH better place
I have the TFL Jet Boat, which comes with a single battery tray, centered directly in front of the motor. The ESC & servo are on the port side, while the Rx is on the starboard side. This causes the Jet Boat to be somewhat unbalanced, with greater weight on the port side (as most probably know, the TFL Jet Boat is not "self righting"). As such, I'd like to 'correct' the balance problem...and, I have an idea on how to do so.
My idea involves moving the ESC to what is currently the battery tray, and then installing two new (and smaller) battery trays, one on each side of the ESC (the Rx would remain on the starboard side, as its weight is almost equal to the weight of the servo on the port side). Although not a perfect 50-50 left/right balance, it would be about as close as anyone could ever get without adding weights. So, what's my question?
In switching from a single LiPo, to two LiPo packs, I have two options. For the purpose of the following examples, let's assume I want a total capacity of 6000mAh. On one hand, I could use two 2S 6000mAh packs in series. On the other hand, I could use two 4S 3000mAh packs in parallel. Obviously, both equate to 4S 6000mAh...but, what I'd like to know is, is one solution better then the other? For example, would one run cooler than the other? Does one provide greater "punch" over the other? Does one less battery sag when accelerating from a standstill? Does one provide less ripple? Or...should I leave it as it is, with a single LiPo centered in front of the motor (even though it causes the boat to be unbalanced)?
In answering, it might also help to know that I'll be replacing the stock 120A ESC with the OSE Raider 150A, and the stock 1620kv motor with a lower kv motor (probably in the 1300-1400kv range). Until now, I've always run the stock electronics on 3S, thus why I'll be going with a lower kv motor. When it comes to something like hydro, where low COG makes a huge difference, two 2S in series is the better way to go...but, with a mono like the TFL Jet Boat, I honestly don't know, thus the reason I'm asking for advise.
~ More peace, love, laughter, & kindness would make the world a MUCH better place
Nortavlag Bulc 
What I meant was in considering what batteries to buy, balance the decision with is there any further application and use for them. Are you going to get a separate set of batteries just for this boat, or ones that are useable in multiple models. Seems like you actually understood the point anyway.
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