Fine until you aren't on shorepower or have 120VAC. Use the ones that run off 12VDC and they work ALL the time.I replaced my outlets with these-
https://www.amazon.com/dp/B084VKN2GX/ref=dp_cerb_1
It's available as 3.0A from a different vendor. It looks like the same product.I have used this one in 3 places because it has an on/off switch to prevent battery drain when not used.
https://www.amazon.com/dp/B07SGJ5DN4/ref=cm_sw_r_cp_taa_GrocFbA68B856
I don't use those cheap Amazon USB ports. Did that mistake once and never again. BluSea has quality stuff.
I have a separate switch I installed(Also BlueSea) to turn off power. Also powers off radio.
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It completely failed and had no power output. Worked for a couple months.Can I ask what happened that you don’t recommend them?