Easy answer .... Boruit R2

It's simple to click on for people with arthritis and boney little fingertips with little strength .it is USB rechargeable so it's easy for anyone to manage charging. A double click doesn't do anything odd other than turn on the red lighted button

How about a touch lamp ? or a light like the zanflare lantern ?

https://www.gearbest.com/table-lamps/pp_1168431.html?wid=1433363

rechargeable ,lightweight and easy to take with you .