The product page warns against compatibility, and even states explicitly not to use with SureFire flashlights: http://www.amazon.com/dp/B002UEE7SU/?tag=cpf0b6-20 "Battery peak voltage without load is 4.2 V after fully charged." "Check your device manufactory for compatibility. Don't use these batteries with SureFire flashlights." How do I know whether these will work with this? Streamlight's website isn't much help. http://www.amazon.com/dp/B00081NHBA/?tag=cpf0b6-20