I pulled the POS open. It has one IC (LM393N) a few small caps, transistors and diods. The IC is a dual voltage comparator and could theoretically shut down charging once the voltage of each side reached a preset level. I'm not a EE so just guessing. There is no mention of Sony on the board and it's poorly made. If this circuit can put out 1.2 amps, I'll eat it for breakfast! 200mw seems much moe plausable. I paid $30 including a NH-14MW. So realisitcaly, asuming the battery is worth $10, $5 for postage the charger is a little over priced. I'd say it is worth $8-$10 max. But it is a cheap way to charge two batteries overnight. Cya