Battery power adsl wifi router

wondering if there's any wifi adsl router with rechargeable battery power so if load shedding starts but not stops my Internet surfing any thing like that?

its a usb powered adsl modem ( i have not used it but check it at local store )

here is official link at dlink site

It's easy to make an External small battery backup unit for ADSL modems or just connect your modem to UPS.

It's a good idea though, because your laptop and mobile phone are working even if you don't have a UPS.