Amazon.com: Kastar 2-Pack NP-FH50 Battery and LTD2 USB Charger Replacement for Sony DCR-SR36, DCR-SR37, DCR-SR38, DCR-SR40, DCR-SR42, DCR-SR45, DCR-SR46, DCR-SR47, DCR-SR48, DCR-SR50, DCR-SR52, DCR-SR55 : Everything Else
GENERIC SR45 replacement battery
Kastar Replacement Battery for Sony NP-FH50 & Sony DCR-SR42 DCR-SR45 DCR-SR46 | eBay
Battery /Charger For Sony DCR-SR45 E DCR-SR46 E DCR-SR47 E DCR-SR48 E DCR-SR52 E | eBay
Amazon.com : Wasabi Power Battery (2-Pack) and Charger for Sony NP-FH100 and Sony DCR-DVD203, DCR-DVD205, DCR-DVD408, DCR-DVD508, DCR-DVD560, DCR-DVD610, DCR-DVD650, DCR-DVD710, DCR-DVD810, DCR-DVD910, DCR-HC28, DCR-HC38, DCR-HC48, DCR-SR42, DCR-SR45 ...
Silver-Oxide Battery SR45 | 1.55 V DC | 67 mAh | 1-Pack | Watch | Silver