I hated to say how old ours are but we got them I think when dd started college(under grad) and she just got her JD. I know we have had to replace the battries twice.
These were top rated by consumers reports. About $65.00 for a set of 16. On this item you really do need to buy a goood quility set. They should have about a 100 degree outside heat range. For our area low teens on some winter days to 115ish on a hot summer day.
skaro964 (rep: 4.1k) posted Sep 17, 2012
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