ORIGINAL: Lars from Norway
Can a [link=http://www.liposack.com/]LiPosack[/link] be a solution to this problem of not letting you have LiPo-batteries?
No, just like hard cases it is a false sense of security at best. Maybe if they were clear but right now they are black so they prevent early detection of problems while the battery is being charged. Honestly the only people I know who are pushing those sacks are the ones selling them, so buyer beware.
Not to mention the inherent danger of suffocation or choking for small children. A lot of small children die every year due to suffocation.
Lars the reasoning for LiPos is all about power density and power-to-weight ratio. You simply can't get it with NIMH or with any other current battery technology except for A123 batteries. If electric is going to match nitro in terms of performance, LiPo is pretty much a requirement. At one time ROAR was full of people who did not want electric to ever be able to stand up to nitro on the track and hence LiPos, brushless motors, all the essential technologies were made illegal. It was only recently as ROAR became irrelevant that they had to capitulate and allow the technology that club tracks all around already had.
In the days when electrics were running NIMH or NiCD these cells were being pushed to the absolute limits. There was more danger involved than today where LiPos can be run well under their rated operating limits. People often times assume too much from watching youtube videos of exploding LiPos firing off jets of flame and things like that. We had a LiPo failure on a bike at the ISC and it was just a lot of foul-smelling smoke. No jets of flame, no fireballs, nothing like that. They just let it burn itself out over the course of 5 minutes, it did some secondary damage to the vehicle but that was pretty much the end of it.