The button cells in a 410 and 905 are like a computer battery except they have solider tabs. The 920's and 922 use a regular axial lead type battery style. 410's are plentiful and can be got for next to nothing on Ebay and in Canada I hear. If it dies its easier and cheaper to replace than a 4DTV.
Either one is suitable. The original battery in the DSR-922 is 2/3 A size which is approx. 2100 mAh.
Found another one at alliedelec.com: Eagle Picher PT-2100-A with axial solid leads for soldering, Allied # 710-8002, $5.82 each.
Be sure to check the voltage while performing the replacement to see how much it drops with the new & old in parallel. An old battery can really cause the reserve charge to drop quickly, so remove the old one immediately when the new is soldered in place( and in the holder of course).
There's a link here somewhere to Alan's site with videos on replacing DSR-920 & 922 batteries.