What i would like to see is a 4000mah 10c lipo in that is the same size as the maxamps old 2100 pack, or possibly smaller... Still good for 40 amps, but twice the runtime. Not sure if that is possible, but the newer chemistry may be able to do something like that.

Yep, the 2100 cells are the only ones that have lasted. I will say that most of them are a mixture of good cells from other packs that puffed, and they go way out of balance even on a crawler. But they were basically free and they fit all of my crawlers really well.

Did I mention they were almost free? I have maybe 80 bucks in 15 2100 cells, and i may have a spare cell or two laying around... 5 bucks a cell is cheap, considering what they sell for new...

If I replace them I have some fp 2170 3s packs that will be used. About the same size and twice as powerful.

Jason just stopped responding to my e-mails. Trying to get packs replaced that kept going WAY out of balance, he told me my setup was drawing to many amps. Packs in question where 2s 6000mah 20C. Should have been able to withstand 120A continuos and 180A bursts. Using BrianG's calc and some common sense told me I wasn't near that. If I could get 20 minutes out of a 6000mah pack my continuous was less than 20A and BrianG's calc estimated bursts 140A bursts. Alex wound up taking care of me, he replaced the packs with something that should hold up a bit better.

ive been running a 6s 4000 from them for a while now, makes me crazy to get it to hold ballance. sometimes i have to charge one of the cells independantly. a cell went bad and i got another one at cost...... $30. not to mention i paid $239 for it a year ago and its now $299 for the same friggin pack

Considering.
 

Yea considering the purchase price of some of the other manufacturers packs of the same or better size dealing with Maxamps is no longer neccessary. There are better rated packs for half what Maxamps charges, and problems with these packs seems to be much less of an issue from what we have been reading on most of the R/C sites. Maxamps is loosing ground quickly in competitive pricing, customer service reputation, dependability, and cost effectiveness. I have Maxamps packs myself, but due to the pricing issues alone with the poor economy it is just not worth bothering with them any longer. They need to work on their product, their customer services, and lower their prices if they want to survive, and keep our business.

i recently purchased some neu 6s 3200 25/50c packs and they run strong, and STAY balanced. plus i got two for the price of one MA 4000 and they are 70g lighter. less capacity but i use about 1000mah in 8 mins. so i can run two 5-7min quals. with one pack or a 15 min. main

i have always had a hard time keeping the cells balanced as well , so much for matching cells.......

anyway i needed one cell once , bad pack and wanted to rebuild, and was told that i couldnt just put one cell in because the cells are matched and it wont stay balanced......it never did from the get go , but the pack is going strong, as long as i dont discharge below 3.3vpc


they have some new hard case packs coming out from what i here , but for the price i will look elsewhere for packs , imho