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 sunlightfor few mins to get it dry, place it vertical if coin with somesupport or wat ever, remove front glass of torch place battery intorch check by doing on off, thereshould be no loose contact, place torch close to material 1inch ok, note time keep obeserving how muchtime takes to drain battery, u can keep snapping photos to differetiate the light, once battery drained, maximum time aceptd 1hr,keep the battery in polythin bags tieng a knock on polything bag to make it airtight, keep observing every hour. Note how much time ittakes to get battery leaked. Any more quiries please ask.