tweetyduck Posted May 5, 2011 Share Posted May 5, 2011 I just love this company ever since the origional powermonkey. startmonkey400 parameters: jump-start current: 12V, 400A, 4,800watts in 6-8 seconds Battery: 7AH x 3, Lithium Polymer rechargeable Battery Capacity: 21,000 mAH https://powertravell...ingsoon/000398/ This is rated to 1200 CCA. Its also small. Its a bit expensive but this would really get you out the carp in a remote area. ps they already do a 200amp version. Same size i think. Quote Link to comment Share on other sites More sharing options...
mmgemini Posted May 5, 2011 Share Posted May 5, 2011 I liked that Until I saw the price Quote Link to comment Share on other sites More sharing options...
tweetyduck Posted May 5, 2011 Author Share Posted May 5, 2011 I know its not cheap.... But the one thing about it is Its small enough to chuck in a tool box/kit for overlanding. Quote Link to comment Share on other sites More sharing options...
Mike Brownlie Posted May 5, 2011 Share Posted May 5, 2011 I use high discharge lithium polymer or lipo batteries in radio controlled applications and I would avoid for this type of application. There is another system out there that adopts the a123 battery and this is more suited to high discharge and re-charge. Lipo batteries tend to explode and puff up if over discharged and recharged. Quote Link to comment Share on other sites More sharing options...
Gromit Posted May 5, 2011 Share Posted May 5, 2011 Lipo batteries tend to explode and puff up if over discharged and recharged. ..and when they explode, the continue to burn Napam style until they have set everything around them alight. I used to charge mine in an ammo box.......... outside. Fun things Quote Link to comment Share on other sites More sharing options...
tweetyduck Posted May 5, 2011 Author Share Posted May 5, 2011 Near on every device nowadays has these batteries. I'd hardly say they are dangerous considering there are millions in use. You could argue hydrogen build up from lead acids caused many a disaster. You're dealing with chemicals and high potential currents. All batteries are dangerous and i'd hardly say this company has a reputation for poorly constructed devices. I've found all their gear to be exceptional. I once saw a spanner evaporate in a 50V 600Ah battery. When i say 600Ah that was the size of each of the cells in the bank. Short circuit current was somewhere in the 10,000 amp range i'd imagine. I should have been using plastic spanners They have a Hydrogen Fuel cell device in developement. Now thats another story. Quote Link to comment Share on other sites More sharing options...
stuck Posted May 5, 2011 Share Posted May 5, 2011 Impressive piece of kit that. Quote Link to comment Share on other sites More sharing options...
Gromit Posted May 6, 2011 Share Posted May 6, 2011 Near on every device nowadays has these batteries. I'd hardly say they are dangerous considering there are millions in use. Most devices have Lithium Ion batteries, not Lithium Polymer. Without knowing the differences in chemistry between the 2, I do know that the latter is much more explody I'm sure that as batteries evolve, the LiPo horror stories will continue beyond the actual risk of using the batteries. Maybe they have already. I have personally had 1 LiPo get hot and swell while being correctly charged - it was less than a year old - and one let lots of smoke out while discharging. Both were from reputable manufacturers and were correctly maintained, balanced, charged and used. Quote Link to comment Share on other sites More sharing options...
Mike Brownlie Posted May 6, 2011 Share Posted May 6, 2011 Lithium Polymer are wide used in all sorts of applications but they tend to be in MP3 players or Iphones or devices with very small current draw. They do not like maximum current draw for long durations so im surprised that they chose this type of battery for this use. An A123 pack or Li-Ion would be much better. A123; http://www.youtube.com/watch?v=qcvmvrmTMMk Quote Link to comment Share on other sites More sharing options...
simonr Posted May 6, 2011 Share Posted May 6, 2011 That looks pretty good to me! I might even buy one! The current generation of LiFePo batteries are much more suited to this kind of high discharge application and are much less likely to give you a Napalm experience. Si Quote Link to comment Share on other sites More sharing options...
Troddenmasses Posted May 6, 2011 Share Posted May 6, 2011 I did it a slightly different way - using the X-Eng split charge kit to allow me to run a second battery for things like the winch, extra lights etc. I put a switch into the circuit so that I could activate the relay even when the alternator wasn't producing electricity - not generally good for the second battery I know, but that way I could use the leisure battery as an emergency jump-start to the main battery. It worked for me. Quote Link to comment Share on other sites More sharing options...
Mo Murphy Posted May 7, 2011 Share Posted May 7, 2011 Very nice but with that price I suspect it's aimed at the chequebook "expedition" brigade Quote Link to comment Share on other sites More sharing options...
Mike Brownlie Posted May 7, 2011 Share Posted May 7, 2011 Very nice but with that price I suspect it's aimed at the chequebook "expedition" brigade you are paying for the lithium polymer batteries thats the majority cost of the device! Quote Link to comment Share on other sites More sharing options...
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