Having spent a moment to read on the net the different tests for a whole lot of AA-AAA batteries chargers, is that it (= Technoline RS 700) that emerged as the best compromise in terms of price / quality / Respect the batteries. The manual provided is very well done and quite explicit for once! The different modes useful according to usage and the age status of the batteries used to load, maintain, cancel the memory effect which can happen over time, and regenerate the old batteries long forgotten at the bottom of a drawer. The charge current is programmable from 200/500 / 700mA. For good health of better batteries always use the default intensity of 200mA (about 13h charging for AA 2600mAh and 5H for AAA 1000mAh) is longer to load but does not heat the batteries and does not damage over the refills, if you are really in a hurry can pass 700mA (about 3:45 to charge AA and AAA to 1:30) it is not "bad" per se, but slightly reduces the duration life rechargeable batteries that do not like heat (heat reduces the life span of a battery). Each of the 4 channels is independent of the others and can be configured differently as required; So one can easily load 3 AA batteries + 1 other AAA simultaneously or switch to test mode and 2-channel mode to refresh the other 2 etc ... all 4 channels are completely independent. An automatic charge termination detection allows to switch to "maintenance" mode that respects the battery. If the battery exceeds 53 ° C, the channel stops immediately and resumes charging when the temperature lowered. In short perfect for the price! The more expensive chargers have little additional benefit of allowing to climb higher in intensity> 1000mAh and thus load faster at the expense of the life of the battery, which has no interest for my use. The delivery model is stamped NS-700 which is the equivalent of the BC-700 for those who do research opinion on the net. Given enough content volume this charger + taken, it is perfectly possible to lamener in his luggage when traveling To go with, I bought Eneloop AA and AAA batteries which are among the best in the market in terms of reliability and service life, and I'm really happy with this set!