Hi Oy,
It's nice to have your message. If you need an emergency LED lamp, maybe, others need it, too. I have some products from good companies in Vietnam with very reasonable price. Lamp can take lighting duration of 8-10h, I buy 23 usd that is chargable, and 4 usd that is with removal battery. We can meet in Saigon during your trip and I show you my products. Burmanese start to use solar panel, that is a good new, I really want to build this systeme everywhere with reasonable price. We will keep in touch? Have a nice day! Nhung