That's a strange decision if you ask me. These days pretty much everything is using inductive transmission of power (contact free). Electric shavers (a bit higher end ones) from Philips and Braun have this, my electric toothbrush from Braun has it (and it's the cheapest one for sub 20 EUR). Philips LED candles used this tech 6 years ago when we were selling them. Hell, i've seen that Mitsubishi is trying to push similar tech to recharge their electric car. Why not make a simpe pad where you place the mouse and it recharges without any physical contacts? That would probably add extra 5-10 EUR to the price but it would just be priceless.
RejZoR's Little Secrets @ rejzor dot tk