Review: Turnigy Ultimate 4600mah 2S2P Hardcase Lipo Short Pack

So I decided upon the Turnigy nano-tech Ultimate 4600mah 2S2P 90C Hardcase Lipo Short Pack because I was able to get it to fit inside the WL Toys 12428.

First thing I did was to plug it into my charger and charge it to capacity (at 1C which is 4.6A) and it ingested about ~3500 mAh in ~83 mins.  The charger is a SkyRC iMAX B6AC V2 and is connected to my Ubuntu pc running GNU DataExplorer:

But the real test is discharge.  On paper my battery charger/discharger maxxes out at 2A discharge, but I was only able to get it to discharge at 0.6A .. not sure what's going on there. 

UPDATE 1: Real world test; since I installed these packs (two cars) we've been out for two RC adventures, we kinda played till we'd had enough and came home, and in neither case did we run out of battery ;) I didn't time it, but I'd say we had fun for 90 mins or more.  Very impressed.

Quick review of Lipo Battery Low Voltage Alarm

These little RC Lipo Battery Low Voltage Alarm 1-8S Buzzer Indicator Checker Tester LED AZ nifties are pretty awesome.  I can't say this is an original discovery; i saw them on ebay.  The idea is you attach them somewhere on your
RC device, i zip tied mine to the battery hold down arm:

..and they'll give you a constant readout cycling between each cell voltage and a total voltage.  The bonus is you can set an alarm to beep at you when it falls below a set voltage, note; it's REALLY loud.

It's not without it's annoyances, in the end i disabled the alarm and just kept an eye on the display.  I think they could go one up on this device and also add a temperature monitor and probe; but still, i think it's awesome for AU$4.