Powering with 3.7v?

Hi all,
I was wondering whether anyone has any experiences of powering the GSM shield with 3.7v? I want to use a lipo battery such as this: Lithium Ion Battery Pack - 3.7V 6600mAh : ID 353 : $24.50 : Adafruit Industries, Unique & fun DIY electronics and kits


To be able to power a GSM module with a LiPo battery we have developed the GPRSbee:


Maybe that's what you have been looking for?

Best regards,

Jan Willem Smeenk