For anyone curious about battery life, I’ve done a couple of rough tests with both sections lit non-stop with no nacelle motors running.
Original batts that came in the box are as you would expect (not very good). About 3 hours until secondary hull was out maybe a half hour later for the saucer section.
I then put in my Amazon Basics rechargeable AAs in the secondary hull (2000mAh capacity) and AAAs in the saucer (800mAh capacity).
Secondary hull lasted just over 14 hours and the saucer cut out about 20 minutes after that. So let’s call it 14 hours non-stop run time with impulse lights on and no nacelle fan motors (just the passive twinkling mode).
Rechargeables are 1.2v/batt vs 1.5v for the standard alkaline batts, so I’m running 4.8v in each section vs 6v but I can’t say I noticed a difference in brightness (or fan speed when I turned them on after the endurance test). They likely are stepping down the voltage for many of the LEDs anyway so not unexpected. Worst case the lights might be slightly closer to scale if they actually are any dimmer.
Knowing 4.8v still looks good will make it a simple USB power connection which I still might do for the secondary hull since there is an existing small hole that will allow access to the battery compartment and won’t be noticeable with how I have mine displayed.
Saucer section is probably not worth ruining the clean lines of the ship to run a wire on the exterior.
I’ll never leave the lights on for anywhere near 14 hours at a time. I just wanted to gauge how often I would put the most fragile parts of the ship at risk (navigational deflector dish and planetary sensor array) with my clumsy hands every time I change out the batts.
I also did a quick continuity check on the battery covers (pics attached) to see how the 4 batts are connected in series in case I decide to run USB power connected to dummy AAs/AAAs. Gray lines show where the terminals are connected.
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