I had exactly the same problem with a car battery unable to maintain >12v.
The 15AH battery at this link was an excellent solution: https://www.bioennopower.com/collections/12v-series-lifepo4-batteries/products/12v-15ah-lfp-battery-blue-w-pvc-pack It is pricy but provided 12.9 volts @ 200ma receive and 12.3 volts @1900ma xmt for 5 weeks at about 1 hour of use a day. The radio ran at 10 watts the whole time. I bought the charger with the battery and recharged prior to a transmit voltage drop below 12vdc. /Dave K1BZ =========================================== Did anybody test any any USB/12V+ battery pack in KX3 or KX2? I have a USB / 12V/8.3Ah model: https://www.amazon.com/gp/product/B01337QXMA/ref=oh_aui_search_detailpage?ie=UTF8&psc=1 Seems to be 3S3 with 11.8V peak, not bad but a bit too little for 10W operation. There are types with adjustable voltage like: https://www.amazon.com/Poweradd-23000mAh-Multi-Voltage-Portable-Notebooks/dp/B015OAJFOC/ref=pd_sim_sbs_107_4?ie=UTF8&psc=1&refRID=NBT8GMPAMS3QZBC6AKWY but if voltages are converted by switching then it can be quite noisy. Traditionally I use 4S2 devices from batteryspace.com but they are getting pricey and don't double as USB chargers. Ignacy, NO9E ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
