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#817637 16/02/25 07:03 PM
Joined: Dec 2021
Posts: 21
Potts Offline OP
New to Talk Morgan
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New to Talk Morgan
Joined: Dec 2021
Posts: 21
Hi,

I need to replace the battery on my 2002 4/4, the current battery can't hold the charge for very long.

It's currently fitted with a Red Flash 750, and I'm wondering if there is any advice on a better spec battery that I could fit. A replacement Red Flash battery is pricey, and as this is the 2nd Red Flash battery that hasn't lasted very long so I'm thinking about alternatives.

Plus, does anyone know the actual battery spec that is compatible with a 2002 4/4 1.8 Zetec

Thanks in advance

Potts #817644 16/02/25 09:07 PM
Joined: Feb 2016
Posts: 7,924
Likes: 217
Talk Morgan Guru
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Talk Morgan Guru
Joined: Feb 2016
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The Red Flash 750 is a 26 amp hour (capacity) AGM battery commanding an astronomical price for its size. It's also has an unusually low height of 125mm together with less common female thread terminals, likely to allow accomodation under the bonnet.

If you can source a similar size one of at least the same capacity (which may explain the modest longevity) at a reasonable price it may be the best course accepting, you may need to change battery connectors to more common type.

Hopefully someone with similar car has done the homework and can offer an alternate. Otherwise you may be stuck having to buy another Red Flash as here.


Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone
Potts #817645 16/02/25 09:12 PM
Joined: Jul 2023
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M
Just Getting Started
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Just Getting Started
M
Joined: Jul 2023
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I have the same car and mine has an Odyssey PC925 with conventional connections.


2002 4/4 Zetec Indigo Blue purchased July 2023 my first Morgan
Potts #817656 17/02/25 08:16 AM
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Talk Morgan Guru
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Talk Morgan Guru
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The Odyssey PC925 is of similar capacity, has the same height and uses the same threaded female terminal configuration so would be straight swap and at a slightly lower price, although still high IMO.

The issue of longevity I think is related to the unusually low capacity for starting even a 1600cc engine, dictated by limited height available under bonnet. This means the OE battery being less than half the capacity of those on later cars, with more spacious accomodation behind the passenger seat, takes proportionally far more out of the battery during each start, so impacting longevity. As the natural ageing process gives a gradual decline in capacity the reserve of same also dicates longevity. This double hit may explain why OE batteries don't last as long as they should despite being of robust AGM design.


Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone

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