This is Lite version of full size charger. Output rated 24vDC 1Amp. 
It is ideal for limited budget and less frequently use of stairlift (less than 4 trips per hour). For full size charger, search in eBay listing#184242711236

Light weight smart charging battery charger power adapter for Bruno SRE stair lifts - fit SRE-2750, SRE-2110, SRE-2010, SRE-2000, SRE-1550, SRE-1540 stairlift models. 
This ETL certified automatic charger will replace original OEM-2402 charger adapter with better reliability and performance. 
Generous 10 Ft. long cable extend the ranching range. 
Assembly and its components are ETL certified. Electrical rating 24vDC 1.5 Amp
1-year parts warranty provided against manufacturing defect.

RECOMMEND TO REPLACE BATTERIES AT THE SAME TIME OF CHARGER REPLACEMENT.