I really liked this watch. The waterproofing was excellent, the little light is still working after about a year and it suits my needs as a healthcare provider. (Analog dial and easy-to-clean strap are very important). However, changing the battery was a major operation. I managed this with the following tools: a bright headlamp, a tiny Phillips screwdriver, tweezers (because those screws are SMALL), and two batteries. That's right - you need 2 batteries, not the one advertised on the network. Below that is the larger CR1220 and the smaller 377. In addition to the 4 screws holding the back panel in place, there are 2 more holding the battery bracket for the larger battery inside. I then had to pry the smaller battery (377) out of its case very carefully - there is a tiny lever above the small battery which can be pushed back with a tiny screwdriver and it will pop out. In short, I would only buy one battery. a new watch if I didn't already have the tools to do the job and if I could find another brand that would suit my needs. But now the deed is done and the little clock is ticking. I'm not sure if it's waterproof yet. crossed fingers
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