A few weeks ago I posted that a lithium battery company asked me if I'd like to test one of their batteries - I agreed and it arrived just after Christmas. I installed it today as my auxiliary battery (shown here before I installed the cover):
Before installing it I ran a test with just the fridge to see how long the lead-acid would run the fridge in current weather conditions before becoming discharged enough so the fridge wouldn't run. In summer weather, that's usually about 2 1/2 days, but that depends a lot on the exact ambient temperature, how many times the fridge is opened, what's in it, etc. In current temps (50 degrees in the garage and maybe warmer when I'm driving the Jeep with the heat on), the lead-acid stopped running the fridge after about 5 1/2 days. The lithium battery has basically the same amp/hour rating (100 vs 101 for the lead-acid) so we should expect similar performance. I'll let the fridge run on the lithium until it stops, then I'll do a number of other tests and start a detailed thread with a review.
But before I start testing the longevity of the lithium battery, I need to solve a few charging challenges - the lithium battery has more demanding charging parameters than the lead-acid I replaced and it isn't charging fully the way the charging system is currently configured.
Stay tuned.
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Update on another subject: LED headlights. I've been using Auxbeam LED headlight bulbs in my JKU for about 18 months now, and I've been really happy with them - they're much brighter than the factory headlights. All through last winter we didn't have a snow situation that caused snow buildup on the headlights. Tuesday I had to drive to Newark and back and on the way down it was snowing in the Pocono mountains - a very heavy, wet snow and this is the result:
I went all winter last year without enough buildup to seriously impair the headlights so this is the first time this happened. Notice in the second photo that there's buildup all over the grille and on the marker lights, which are incandescent bulbs. Looking at other vehicles on the road that didn't have LED's, there was buildup on their headlights as well, so this was a snow that was heavy and wet enough to impair halogen headlights as well. That doesn't mean LED's are as good as halogens when it comes to resisting snow removal though, the lack of heat generated by LEDs definitely makes them more susceptible to snow buildup.
So what to do? A few options:
1. Do nothing. Having gone all of last winter without a problem and seeing that yesterday's snow was also building up on halogens on other vehicles, maybe the problem isn't worth a lot of effort. And I'll be moving to Delaware before next winter where there's a bit less snow than upstate NY, and anyway Jeep feels that LEDs are good enough without heaters to offer them as an option on JL's.
2. Implement the headlight washer solution I posted about a week or so ago. Easy to implement and low cost.
3. Develop my heater overlay idea. I came up with this last year, the idea is a flexible resistance grid that can be installed over the headlight lens for the winter. It would install using the headlight clamp ring. The resistance elements would be thin enough not to significantly interfere with the headlight beam, think of it like adapting a rear window defroster to a headlight lens and having it be removable in the spring. I've done some work with resistance heating elements on several projects in the past so I know what's required to make this work, I'll just need to source a few materials.
Since I'm very busy with preparing for the move to the new house, prepping the current house for sale, downsizing and getting rid of lots of things here like molds for Jeep parts I'll probably never need to use again, I don't really have time to implement #3 although I think that's the solution I prefer, so I think I'll do #1 for this winter and hopefully have time to develop #3 before next winter. And until then, if a snow like this happens again, it's not too much trouble to stop periodically and wipe the snow off the lenses.