Hi bro, here is how companywil perform test. Required stuff :  1torch (plastic body). 2big battery (everyready white pater coated model 9D20 R). 2Eno schachet regular. Few transparent polythin bags. A pair of surgerical gloves. First wear gloves, wash the material with eno, expose it to sunlight for few mins to get it dry, place it vertical if coing with some support or wat ever, remove front glass of torch place battery in torch check by doing on off, there should be no loose contact, place torch close to material 1inchok, note time keep obeserving how much time takes to drain battery, u can keep snapping photos to differetiate the light, once battery drained, maximum time aceptd 1hr, keep the battery in polythynbags tieng a knock on polything bag to make it airtight, keep observing every hour. Note how much time it takes to get battery leaked. Any more quiries please ask.