Update on Energiarecargable.Com. This is a typical Buenos Aires story so I thought I'd pass it on.
I went to the store, but it's now called ProBattery not Energiarecargable, no hint from the really well done website. BUT in addition to the the 99 peso fee for the new battery, they charge a service fee of another 100 pesos for changing it. No mention of this small service fee in their add, although they did make a lot of noise about changing the battery right in front of you. bla bla. My wife tells me I was a bit rude to the man, which I admit. I was very annoyed especially since 200 pesos still isn't a bad price for the new battery. But they should have mentioned that in their ad. Oh well.