Bests & Worsts Reviews from Amazon

I bought these hoping to use them on my boat dock. They do work ok but last only about 6 hours, not until daybreak by no means (7PM to 1 AM). I wanted them to last until 7 AM the next day. This isn't even winter yet, so the amount of sunlight will be shorter and less and the nights will be longer then. I estimate they will last only about 4 hours at best, running from 6PM to 10 PM. Sunrise will be about 8AM by late December. So, I looked for a solution. The included AA size battery is a generic brand 600 mAh NI-MH rechargable type. Now 600 mAh is very small for this type. Most Energizers are 2000 mAh and Duracells are 2500 mAh. I tested the included battery and the result was not good. It tested at only about 240 mAh capacity and even that was giving it very generous usable voltage limits. I tested a Duracwell 2500 mAh version and it did perform at that rated capacity. So that Duracell battery has 10 times the capacity as the poor one that came with the light. I installed the Duracell battery into the light and it did last all night over a period of one week. So the result is that you can make this light set perform at it's best by changing the batteries to better ones. The Duracell batteries I used cost about $3.25 each. It is not necessary to purchase the Duracell charger, they come already charged. Energizer Ni-Mh AA should perform about as well. https://www.amazon.com/Duracell-Rechargeable-AA-Batteries-Count/dp/B00007ISWA?th=1