philTBA
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- Joined
- May 16, 2015
- Messages
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Can't find the thread on this. Maybe a nice helpful mod could move this if they can find it.
Ok, latest 3s cell trial started yesterday.
I picked up a pair of Turnigy nano tech LiPos (1300mAh 25C "50C burst") complete with Deans plugs already fitted, for £26.95 inc free P&P (the cells arrived next day !) and came with a free battery condition checker.
The first VTbox with a nano tech fitted went into use @ 3.45pm yesterday. A stock LiPo should run me through to 3.45 today, as I usually get 11-13 hours use from these. I've been running 2x VTs in rotation for some time, and 3x VTs for the past week or so, and all return the same use time per charge.
At 2.45 today (23hours) it's looking good, still showing around half charge.
The nano techs both showed half charge, and where on charge for 4 hours each before reaching full charge. The stock cells are a 6hr charge from weak battery warning.
This is the important stuff !
The Turnigy nano tech cells are a snug fit, and need to be altered SLIGHTLY.
At 72mm long, the Turnigys are 2mm longer than the,stock cells, this makes a BIG difference.
They DONT FIT !
That needs some explaination.
They don't fit when they arrive. As they're designed for quads/drones, they come with some padding. I had to VERY CAREFULLY remove the outter shrink wrap, then, VERY VERY CAREFULLY, remove the spongy pad on the top of the cell. This allows the cell to fit in the box.
You need to use scissors or snips to remove these, and if you get it wrong, you'll end up with a handful of hot sticky lithium polemer that's very likely to be on fire ! SO BE CAREFUL.
It will look like this when it's done.
Not as pretty as the orrigional look, but it's still all covered, and SAFE.
They're still snug, but should be fine. Turnigy say these cells have a maximum 'swell' of 5% under load. 'Load' in RC terms, is supplying 10-11v, at close to, or on maximum amps for a lot of the run time, and charging @ 5C rate. Use in a VTbox won't get these cells anywhere close to those limits so swelling shouldn't be an issue. The cell is snug at the sides, but slips into place easily, and there's 2-3mm space between the battery and side plates on both sides.
There was no excessive heat during changing in the box, or in use.
Very early signs are these would be the best option, plus, they're the largest capacity and C rating I can find that fit the VTbox. Turnigy have a 1500mAh 45C (90C burst) nano tech, but at 74mm long, even with ferocious trimming they won't fit.
Here's the link to where I got mine.
http://www.ebay.co.uk/itm/281453900596?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT
Or, if your not in a rush and don't mind swapping plugs. £19 a pair.
http://www.ebay.co.uk/itm/301803290701?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT
Ok, latest 3s cell trial started yesterday.
I picked up a pair of Turnigy nano tech LiPos (1300mAh 25C "50C burst") complete with Deans plugs already fitted, for £26.95 inc free P&P (the cells arrived next day !) and came with a free battery condition checker.
The first VTbox with a nano tech fitted went into use @ 3.45pm yesterday. A stock LiPo should run me through to 3.45 today, as I usually get 11-13 hours use from these. I've been running 2x VTs in rotation for some time, and 3x VTs for the past week or so, and all return the same use time per charge.
At 2.45 today (23hours) it's looking good, still showing around half charge.
The nano techs both showed half charge, and where on charge for 4 hours each before reaching full charge. The stock cells are a 6hr charge from weak battery warning.
This is the important stuff !
The Turnigy nano tech cells are a snug fit, and need to be altered SLIGHTLY.
At 72mm long, the Turnigys are 2mm longer than the,stock cells, this makes a BIG difference.
They DONT FIT !
That needs some explaination.
They don't fit when they arrive. As they're designed for quads/drones, they come with some padding. I had to VERY CAREFULLY remove the outter shrink wrap, then, VERY VERY CAREFULLY, remove the spongy pad on the top of the cell. This allows the cell to fit in the box.
You need to use scissors or snips to remove these, and if you get it wrong, you'll end up with a handful of hot sticky lithium polemer that's very likely to be on fire ! SO BE CAREFUL.
It will look like this when it's done.
Not as pretty as the orrigional look, but it's still all covered, and SAFE.
They're still snug, but should be fine. Turnigy say these cells have a maximum 'swell' of 5% under load. 'Load' in RC terms, is supplying 10-11v, at close to, or on maximum amps for a lot of the run time, and charging @ 5C rate. Use in a VTbox won't get these cells anywhere close to those limits so swelling shouldn't be an issue. The cell is snug at the sides, but slips into place easily, and there's 2-3mm space between the battery and side plates on both sides.
There was no excessive heat during changing in the box, or in use.
Very early signs are these would be the best option, plus, they're the largest capacity and C rating I can find that fit the VTbox. Turnigy have a 1500mAh 45C (90C burst) nano tech, but at 74mm long, even with ferocious trimming they won't fit.
Here's the link to where I got mine.
http://www.ebay.co.uk/itm/281453900596?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT
Or, if your not in a rush and don't mind swapping plugs. £19 a pair.
http://www.ebay.co.uk/itm/301803290701?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT