Quality Control of Lead-Acid Battery according to Its Condition Test for UPS Supplier and Manufacturers

Table 2

Service time and discharge voltage of regression analysis.

Variable	Coefficient estimates	Standard deviation	-value	value	Significant	-square
Constant	12.937	0.354	36.54	<0.0001	1%	0.0665
Time	−0.0115	0.0049	−2.34	0.0224	5%