Instruction: Given a question and the related document, predict if the question is answerable based on the information provided in the document. Output only yes or no.

Input:
Question: how i know when the battery is full charge when i charged ? thanks
Document: There's some sort of short in the switch (by loosening / tightening the lens, the light will blink momentarily and the switch will glow green, but then the light will not switch on) and the battery won't take a charge (hooked it up and charged overnight... still red). Having terrible luck with these cheap, Made-in-China light sets... going to look for something else as it seems you get what you paid for with these things.
7 hours on full power! amazing. the 8800mah battery lasts forever. brighter than magic shine, lasts longer. connectors are just OK. battery pack holder and strap could be better. great value overall
Who really cares about the color so long as the light stays on and you're vigilant about keeping the battery charged. The stitching on the battery pack is awful, I had to tape up the strap loop it's holding fine but be aware quality isn't consistent.As said in another review the instructions are a joke, but not necessary anyway.
**Update**After riding with this light for a month, the battery cable broke right at the plug for the light. I'm not going to solder a fully charged battery. So this is junk, and completely changed my review. I previously gave it 5 stars, but this thing was actually not durable at all, thus the 2 stars.
I'd still recommend it, because it's a nice bright light, just beware that you'll have to figure things out on your own. Basically you just plug the battery pack into the wall charger and leave it in until the light turns from red to green, then it's ready to go. Then unplug, and connect to the light, mount to your bike with electrical tape and the provided rubber ring, and you're ready to go. The power switch for the light will be green if it's fully charged.
I use this on my commuter bike. It works brilliantly, literally. It is brighter than some of the car headlights that pass by. It has a bright, dim, and flash setting. I typically ride with the dim setting as to not overly blind my fellow cyclist!There's no instructions but there's not much to figure out. The charger light tuns green when the pack is fully charged.I mounted the battery pack under my seat.
LOOK OUT FOLKS ... you wana headlamp for the bike...this is it. Holly cow man ....  talk about BRIGHT. Item arrived FAST;  charged battery and turned it on; it is extremely bright to say the least. Great field of view from the light beam;  can see far ahead and to the right and left at any speed. Three modes; low-medium-high; offers great light output at any level.
I have had this light for about four months. It seemed to be a good choice for the money but as I have come to find out you get what you pay for. Twice the highest setting on the light would just go out. Mysteriously a few days later I would be able to once again use the brightest setting. Very odd. Then, last night before I needed the light for an event it quit all together. Fully charged battery but the light would not turn on at all.
I have 2 magicshine 808s and they are great for the money. I bought 2 XLMs since they look very similar. One of the two did not put out much light even with a fully charged battery. I sent it back for a refund. I kept the other which works fine but is not as bright as my magicshines which cost 3 times as much.If you're pinching pennies these lights may be ok but be advised that you get what you pay for (low quality) with the cheaper price.
Even though it took a long time to charge the battery, I still like this light. It is very bright and easy to install.
Answer: no