Battery replacement?

[Wastelands]

Hi! I have old battery. I want to change to new. I can see some replacements which are even more capacious for less $. Is it a marketing trick or a real value?

 

[B. Diddy]

There are certainly compatible batteries that have more mAh, and therefore provide longer battery life. But make sure you go with a reliable brand (like Seidio, for example) as well as a reliable seller. Be cautious with no-name brands or sellers on eBay with iffy reviews or not many transactions.

 

[jaluis]

I bought this one :

MTEC Bateria Original para Samsung Galaxy S2 i9100 SII BAT3860 EB-F1A2GBU móvel Accu

(I can´t post links... I suggest you search it on Ebay)

...and still no problems to date. It doubles the battery capacity to 3500, but the phone gains a "back belly"