Maxamps and Neuenergy lipo testing

[lincpimp]

Ok, since I have converted to enerland cell based packs and noticed large difference between them and my maxamps paks I figured that some testing will be in order.

I have a neuenergy 5000mah 3s 25c lipo, and bdebde is sending me a maxamps 5000 3s lipo (thanks). Maxamps claims to have a 20c constant rating, and that has been the basis of alot of conjecture.

Heres a link to each battery:

http://www.rc-monster.com/proddetail...eu3s5000car25c

http://www.maxamps.com/Lipo-5000-111-Pack.htm

I know that this is an apples to oranges comparision since the neu pack has a higher rated C value. My main intention is to show voltage drop under load, and see how the pack's actual performance compares to their advertised ratings.

Test vehicle will be a crt.5 with a variety of different motors. Currently setup with a MM and a plett maxximum. It has the rcm ext chassis, stock susp, diffs and center spur. I am currently running a maxamps 4200 3s pack, but will move the equipment around to fit the longer lipos. I also have a few other vehicles that can use the packs. I may also test using them, but will first focus on the crt.5. Gearing will be listed for each test, as well as my subjective thought on the performance.

Test equipment will include a voltmenter, eagle tree datalogger, bushnell radar gun, IR non-contact thermometer, and the seat of my pants! Charging will be done on either a hyperieon 5i or a duratrax ICE. I may test the setups twice and use each charger to make sure that my charge times and mah used are correct/accurate.

I plan to test both packs with the plett, a novak hv 6.5 with the 5mm shaft, and a hacker c50 6l. Both the plett and novak have similar kv ratings, around 3100kv. The hacker has a kv of 4400 and will be used if the batteries prove strong enough for the other motors, or I just need more load than gearing can provide. I will gear all of the setups up as testing goes, in order to place more load on the equipment.

Testing site will be a mixture of street and grass. My main intention is to get a decent load on each pack and determine voltage drop. I will radar each setup to verify loaded kv and attempt to match each motor/gearing combo. The eagle tree will be used to record data during the run, and graphs will be posted. If time allows I may also run each pack to the lvc to validate the pack's capacity claims. I do set my lvc to 3.1v per cell, just to be on the safe side. Keep that in mind if I post any capacity results.

Any and all info, questions, suggestions, and other test results (and critisism) are more than welcome. It is my hope that this testing will help validate the mfg ratings and give potential buyers some addl info about their planned purchases. I will do my best to minimize the variables and provide an unbiased test of each pack. I will also be honest with my findings, so I would appreciate it if non fact-based comments be left out of this thread. Not to sound harsh, but I really do not care how great you think x brand lipo is unless you have tested everything else.

And I will TRY (note the prvious word) to get some videos together of the runs. This is dependent on my painter bringing me his camera.