A number of people report built in batteries having issues. Funny, my Lumicon Sky Vector DSC (remember those?) controller from the 1990's used a standard 9v battery and was so very simple. It never failed me in 20 years. 9v batteries are inexpensive and, and at least for me, easily lasted two nights, even on the cold winter evenings. But I've moved on from that device.?
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I currently use a Nexus II that links the encoders on my telescope(s) to my iPhone. It has a built-in rechargeable battery and is great. I'm just glad a bought a spare Nexus II because when the battery does run down it DIES, with no warning.?
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I also have a SkyFi controller from Simulated Curriculum that I use with my 10" Orion IntelliScope. It allows me hop from celestial object to object using my iPhone, instead of relying on the somewhat awkward and outdated Orion Object Locator hand controller. The battery depletes all by itself, even when turned off. Roy D. can attest to that. His does the same.?
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We complain but just think of the amazing things these devices do. When I think back of the days of using paper star charts, I thank my lucky ~stars~ we have what we do today.?
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Kent
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Kent Blackwell