ER17-33-1S Alternate with the following models：

ER17-33-1S

The productMAXELL ER17-33-1S is perfectly compatible with the product model MAXELL ER17330 Backup PLC Industrial Control With solder tabs :

For 1PC ER17/33 battery

http://pc-laptop.co/maxell-battery-ER17-33-1S-p216445.htm