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I think we need new batteries for a 59"7 narrow boat 4 leisure batteries and .1 starter battery ok . the 4 leisure batteries 2 show red and 2 show green as i can not get 2 of the same make of batteries can you mix diferant makes together thanks

Asked by: janet alderson  | 8.20pm, Monday 2 September

WW says:

It is possible to mix batteries as long as they are the same type.
I would however not recomend it as different manufacturer's products can be slightly different.
Although 2 batteries out of the four seem okay, the other two will not last much longer and it is certainly better to replace the whole set of four at the same time.

Rupert Smedley  | 11.17PM, Monday 2 September

The type of batteries usually fitted to narrowboats are deep cycle leisure cells; which can be conventional wet batteries or the more advanced AGM or Gel types. Four or five years is generally the maximum life expectancy with careful looking after; keeping well charged when the boat is left ( a solar panel is good for this, or a multi stage charger) and checking the electrolyte levels regularly (not necessary for gel batteries). The capacity will gradually reduce over the lifetime of the battery, with the complete failure of one cell marking the end. Poor positioning of the batteries and neglect will hasten their demise.
The batteries that will last longer, probably ten years or more, are the big deep cycle traction batteries fitted to fork lift trucks. It is however difficult to fit these to an existing boat as their shape, size, and weight, are quite different and really need to be incorporated at the design stage.

Rupert Smedley  | 11.21AM, Wednesday 4 September

Readers say:

thanks. now can you recommend the best batteries that will last for 10 years or more as we are crewsing for the next 4 years in October thanks

janet alderson  | 6.24PM, Tuesday 3 September

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