I have this charger for more than 3 years. I make great use rechargeable batteries for 24 years, for the flash photo, former AFN my cefar easy that I use as a walkman;) The notice states that the LEDs do not change color over load, but provided a table charging times according to the power and type of your batteries (micro, cute and 9 v) .I respects to the letter c It is perfect for my NiMH 4 or 5 years or one year. This is not a "smart" charger or a quick charger; fast chargers prematurely wear out the batteries; not that they heat up, this is normal, but fast chargers are like truck battery chargers for battery twingo ... By following this table, I have not worn my nimh batteries (1800.2300 and 2500 nimh mignon or micro AAA and AA, or 9 v). I also use my charger at the same time Mazda 24 years (when there were only the NI-Cad); 24 years of rechargeable batteries good people;) But I also died there 5 years to the temptation of the charger "intelligent", a Voltcraft who was unloading, reloading, acknowledged batteries, flashing green when it was over six months ... the machine lasted , charging nothing. Naturally, I followed to the letter, word for word use precautions. Meanwhile my Mazda still walked :) See the benefits of this charger cheap and ignorant: 1 / no adapter: charger adapter. So no cable that folds and breaks, or lost transformer rendering it unusable despite its potential intelligence; 2 / the product compactness 3 / reliability 4 / robustness 5 / price. PS: it has increased ... PPS: 4.90 euros buy it !!!!!!!!!