For the location at 野架, choose a site with good electromagnetic conditions; there's no need to operate at full power.
I am a dual-battery system. 4S 10Ah, ic718 50W SSB can be used for half a day.
1. For maximum power, I recommend using a DIY 4-series 30Ah lithium iron phosphate battery pack. If you're replacing individual cells, aim for a cost of no more than $200 per cell, plus the cost of the case and wiring connectors with a voltage meter (around $200).
2. Ready-made batteries can choose from 4S RC batteries, with different capacities and prices.
3. A used electric car battery is also a good alternative option, costing around 50-60 yuan for a 20A one, compared to over 100 yuan for a new one.
4.18650 and 21700 DIY assembly is not recommended. First, you need at least 20 cells in a 5-in-parallel and 4-in-series configuration. It's difficult to match the capacity and internal resistance, and even getting consistent parameters from batteries of the same batch is challenging. And don't even mention capacity exaggeration. Furthermore, using a soldering iron adds to the cost.
5. Consider capacity and portability. A 20Ah battery should be sufficient for most users.
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