Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: Hi, Does this replacement battery come with a case?  thanks   Norm
Document: So far so good. Only downside it does not come with a charger and no documentation. I charge mine for 4 to 8 hours.
I purchased the pack for a Cree 3 bulb (3800 lumen) light. The connector didn't fit exactly, so just a heads up on that.In general, the mAh ratings on 18650 cells isn't very accurate - with 6 cells at a typical real capacity of 2300mAh per cell, this battery pack is probably accurately rated at 6600 (3 groups of 2 cells for total of 8.4 v).It did come with a velcro holder that's not shown in the photo.
the back-up battery is a must have for a securitying light system with remote batteries. unlike incandescent lights, led are on and bright until they go out with warning, usually in the worst time. I wish they had a selector switch to use 2 batteries together without having to dis / reconnect. also this connector is not threaded as the (smaller 4 cell) battery that came with light has. also, re-stich the attach Velcro webbing to the case, both mine torn off first week.
Battery died after a week's use.
The battery on low power lasts less than 1 hour.
I don't know what to say about this product other than its a battery. It works? Hopefully it holds up! We all love Chinese batteries!
Can't beat this price for a backup battery. It fulfilled my expectations of at least an hour of continuous use.
Great product that holds a charge!! Buy this to replace the battery that comes with most LED bike lights. Thank you! !
Connection to charger is a problem.... Doesn't connect tightly so the battery doesn't charge without taping the two together.... Just a hassle.
I bought the battery because I had purchased a light in the past but the battery that came with it sucked! this battery works great
Answer: no