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R4 doesn't always connect properly to the battery and then either doesn't work or blinks once when the switch is pressed. Usually fixed by disconnecting and blowing into the connectors, then reconnecting.
Is this a common problem? Is there a fix?
Might be worth ringing Hope.
I had a similar issue with my Hope light, turned out to be the male pin in the connector on the battery lead has a slot in it that closes up over time. Pushing a very small screwdriver into the slot to widen it fixed it. I was going to send the unit in but a quick chat on the phone revealed the above solution.
Happened mine, sent back and Hope replaced all the wiring on both lamp and battery for me
Ring Hope, or try electrical contact cleaner first - it works brilliantly by clearing crud and corrosion.
Thanks, will give the screwdriver fix a go then contact Hope if it doesn't.
[i]And the contact cleaner[/i]
Put a tube of thin paper around the inside of the connector first - avoids shorting the battery with the blade of the screwdriver. Shouldn't be a problem but ...
Hope told me the connection can get dry and to use contact cleaner or silicone spay. The latter has worked for me, just a quick spray when ever it starts to play up.