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      01-28-2016, 06:22 PM   #1
IB M
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Has anyone used this BMW branded battery tender? Thoughts on how well it works? I had to jump start my car last week
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      01-28-2016, 06:28 PM   #2
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Has anyone used this BMW branded battery tender? Thoughts on how well it works? I had to jump start my car last week
It is a C-Tek MUS 4.3...

Should work fine. However, if the battery is going out due to age, even a constant charging won't re-store it's cold cranking amps.
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      01-28-2016, 06:30 PM   #3
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Looks like a high quality ctek
Two thumbs up
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      01-28-2016, 06:35 PM   #4
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My battery is just over 3 years old but sits a week or more at a time so I really should be using a tender. Assume it works on other cars as well including older BMWs.

BMWBLOG did a write-up and liked it.
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      01-28-2016, 06:38 PM   #5
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Quote:
Originally Posted by Beemdog
Quote:
Originally Posted by IB M View Post
Has anyone used this BMW branded battery tender? Thoughts on how well it works? I had to jump start my car last week
It is a C-Tek MUS 4.3...

Should work fine. However, if the battery is going out due to age, even a constant charging won't re-store it's cold cranking amps.
Have to research if it's cheaper without the BMW logo; but $95 from BMW isn't terrible.
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      01-28-2016, 07:50 PM   #6
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Have to research if it's cheaper without the BMW logo; but $95 from BMW isn't terrible.
It is only $68 with free shipping for the C-Tek MUS 4.3 on Amazon.
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      01-28-2016, 09:33 PM   #7
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I use this one, which is at the same price point. It has worked well for four winters.
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      01-29-2016, 10:31 AM   #8
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Another nod for C-Tek, but it looks like it's just rebranded.
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      01-29-2016, 10:34 AM   #9
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If you have an AGM battery, you want a CTEK charger.... Or the rebranded BMW one
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      01-29-2016, 12:48 PM   #10
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Wouldn't a Battery Tender Jr. work just as well for a lot less money?
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