Forum Discussion

RVhiker's avatar
RVhiker
Explorer
Apr 08, 2015

Adapter for 12 volt DC > 4 volt DC

We use a Jetpack (Verizon internet connection device)in the RV and usually leave it turned on all the time and being recharged by the RV 12 volt system. The Jetpack lithium battery (18 months old) swelled up and is now out of the Jetpack, which will not work without the battery even when connected through the charging port to the RV DC supply.

I currently have the Jetpack powered by three AAA batteries and it works well. I'd like to find a 12 volt to 4 volt adapter that could provide fairly stable DC voltage of 3.8 volts (say 3.5 to 4.5 volts) from an input of 12 to 14.5 volts DC. Any suggestions as to where to find such an an adapter and what kind to get?
  • BurbMan's avatar
    BurbMan
    Explorer II
    Apr 08, 2015
    I found that our Jet Pack (Pantech) gets amazing battery life, so only plug it in at night to recharge while we are traveling.

    Anyway, I believe that USB voltage is 5v DC, but HERE is a DC-DC converter with input voltage from 4v-32v DC and adjustable output voltage from 1.25v-35v DC for $16.50. They have a few different models.

    Actual RV voltage is normally 13.6 when powered by the converter in the coach.

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