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#831359 30/09/25 10:13 AM
Joined: May 2025
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Whizjet Offline OP
Just Getting Started
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So - during my motorcycle years, I had an Optimate, which I'd connect to each motorcycle for a couple of days every month - particularly during the winter months when usage was significantly reduced.
I was told this wasn't suitable for a car, and I acquired this CTEK unit, which seems to fulfil the same function.
I'm interested your views on whether the same sort of application is advised - my Roadster has a specific 'cigar lighter' socket under the instrument panel which I understand allows direct charging.
I'm having difficulty understanding whether there's any significant difference between the two units and more importantly whether there may be any drawbacks or risks associated with overcharging.

Many thanks!


Ben

2014 Roadster 3.7
2016 Audi S-Line Black Edition TT
2018 Mini Cooper (herself's)
Whizjet #831361 30/09/25 11:53 AM
Joined: Jul 2007
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I would use the cigar lighter as the connection can be poor, I use the CETEK comfort connector to the battery with an inline fuse.


JohnV6
2022 CX Plus Four
2025 Renault Scenic Alpine etech "Yvette"
Whizjet #831362 30/09/25 12:03 PM
Joined: Aug 2006
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Talk Morgan Guru
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Ben, I use a MXS 5.0 and have found it to be excellent. In particular, I like the battery conditioner mode. After many years of use, I have zero complaints.

One thing to watch is the price does vary drastically - I've bought my two via Amazon and found the prices swings by +/- £20. A site like CamelCamelCamel UK will give a good bench mark as to price trends and will alert you when the price drops to a level you are comfortable with.

In terms of connection, I've tended to use these, direct to the battery, as John mentioned:

https://amzn.eu/d/a63WuVp

The indicator one is pretty basic, with the traffic light system but does help a little if you don't want to plug your car in each time you use it and just want a simple visual reference as to if you need to charge it or not. You can, should you prefer, get one without the indicator:

https://amzn.eu/d/hAMEZrl

Whizjet #831363 30/09/25 12:46 PM
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Talk Morgan Enthusiast
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I use the CTEK MXS 5.0 with magnetic comfort adapter for more convenience, no problems!


Ruut Bianchi
Morgan PlusFour 2023 Bentley Midnight Emerald
Morgan 4/4 4-seater 1990 Royal Ivory
Whizjet #831375 30/09/25 04:44 PM
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Black Rat
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I connected my CTEC directly to the battery terminals and drilled a hole through behind the passenger seat to feed the cable through for ease of connection, leave it connected most of the winter unless I'm using the car once or twice a week.


Keith
2013 narrow bodied + 4 Ruby.
Whizjet #831376 30/09/25 05:12 PM
Joined: Jun 2014
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Same as Keith for the connection. Whilst I have never tried to charge using the 12v lighter socket I have heard that it can cause problems so best go for the dedicated connector, the cables are normally supplied with the Ctek.
Once charged the unit goes into a battery maintenance mode, no idea how it works but it does, so no chance of overcharging or damaging the battery.
Have used the charger on my Morgan’s for the last 20 years and never had any problems.


Andrew
'Alice' 2013 Duratec Plus 4. Pearl Blue
Whizjet #831392 30/09/25 11:59 PM
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I've used CTEk's for years, both direct to battery or through the "12v outlet'', ciggy lighter to me, never had a problem with either.


1969 4/4
1995 plus 8
1996 Plus 4 4seater
2002 Aero S1
2013 M3W
2014 Plus 8
Whizjet #831402 01/10/25 09:29 AM
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Needs to Get Out More!
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There can often be a large difference between something working and something engineered to be optimal. The cigar lighter socket was designed for just that. It doesn't have any locked connection, relying on a sprung positive contact and little more than friction for the return connection, limiting the current it can handle. It's location under dash further adds to the likelihood of connection breaking. Clearly not best suited for alternate tasks.

The supplier of my highly recommended Maypole 4 amp charger and some others, provide a small loom to allow permanent connection direct to the battery. This minimises volt drop by reducing the electrical path and many unseen connection points in between. It terminates in a polarity sensitive connector that matches that of charger and includes an insulating cover.


Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone
Whizjet #831407 01/10/25 11:38 AM
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Talk Morgan Enthusiast
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I used the Ctek on my 2011 Plus 4, always through the lighter socket. The Ctek seems very useful for maintaining battery health:

https://www.ctek.com/uk/battery-cha...yAB_Sa6oPgWPyNjyX22okMgOHX3Smgruv_v2UhRZ

Whizjet #831408 01/10/25 12:11 PM
Joined: May 2025
Posts: 67
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Whizjet Offline OP
Just Getting Started
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Marvellous - thank you all very much; that's really helpful.
I'll continue with the cigar lighter plug-in and also continue with the system I use on the motorbikes of charging up for several days every month during the winter.
Particularly useful to note no chance of overcharging, that's what I liked about the Optimate.

Many thanks All.


Ben

2014 Roadster 3.7
2016 Audi S-Line Black Edition TT
2018 Mini Cooper (herself's)
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