Bought 2 years ago, charged and sat on the shelf unused until now with the power being knocked out by a storm.
This battery held it's charge at 100% these past 2 years. My phone, laptop and the units emergency light running; providing time until depleted which says 15hrs. I think this unit would last for about 2 days of usage if I shut everything off when I goto sleep and turn it back on tomorrow evening or a midday charge.
Great to have in an a emergency! Quality stuff! Lightweight. Great value.