How long will it take to completely charge the battery? 1 to 1.five hours How much time does it take to charge the battery to fifty%? thirty to 40 minutes When charging the battery for 30 minutes, to what % is it charged? ~fifty% How many smoke only tests do https://www.thesafetycentre.co.uk/blog/testifire-xtr2-fire-alarm-testing-equipment-range-faqs/