On ebay it cost about 44.06 US dollars
1. http://shop.ebay.com/i.html?_nkw=7.2+Volt+4000+mAh+NIMH+battery&_armrs=1&_from=&_ipg=

On alibaba this one cost almost 10 us dollars per pack
1. http://www.alibaba.com/product-gs/299765021/NI_MH_rechargeable_battery_pack_SC.html
2. http://www.alibaba.com/product-gs/320764992/Ni_MH_Battery_Pack_SC_size.html

Don't forget to rate. Thanks

Will the above battery above (#2) work with the Proton PDS-758LP? Can someone confirm this?

Thanks