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This really is a piece of cake!

Tools required: Philips-head screwdriver, common sense.
Materials required: 12V 7AH (12 volt, 7 amp-hour) sealed lead-acid cell. Widely available from around £15, such as the Yuasa NP7-12.

The hardest part is removing the battery pack from the fabric holder. It is fixed tightly with velcro, but once you've got part this, it just slides out.

Step 1:

Lift the battery out of the plastic bucket it sits in.

You then need to remove 12 screws - five on either side and two on the bottom.

Step 2:

Slide the bottom section off, and you can now see the cell and electronics.
Remove the leads from the battery - they'll just slide off.

Step 3:

Take the protective plastic covers off the terminals of your new battery.

Step 4:

Attach the new battery, making sure to attach the red lead to the positive terminal and black to the negative.

Step 5:

Finally, put it all back together, making sure all 12 screws are just tight.
Give it a charge, and off you go!

This is not endorsed by Bowens or Yuasa and I take no responsibility for you electrocuting yourself!

All the copyright of all photographs in this instructable are the property of the creator, and must not be used without permission. 
Hi, just replaced mine battery and it works perfectly with £15 battery, saving me a small fortune ;-)

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Bio: I am a freelance photographer, and dislike being charged extortionate amounts for for bits of wire!
More by theos75:How to change the lead-acid cell in an original Bowens Travelpak 
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