How long will it take to completely charge the battery? 1 to 1.five hours How long does it take to charge the battery to fifty%? 30 to 40 minutes When charging the battery for thirty minutes, to what % is it charged? ~50% How many smoke only tests do you https://www.thesafetycentre.co.uk/blog/testifire-xtr2-fire-alarm-testing-equipment-range-faqs/