I have several LFP, Lithium Iron Phosphate, batteries. Gave up on any type of Lead Acid since they tend to get wrecked if you don't keep them on a battery tender at all times to trickle charge. The LFP's can be charged up and sit around for months or longer, great for emergency use, and they don't discharge hardly at all. In fact for long term storage it's recommended NOT to fully charge them. Try that with a Lead Acid type and you will kill it.
The LFP batteries have a higher terminal voltage, around 13.3 VDC to 13.4 VDC when charged making them a better match to mobile equipment that expects a nominal 13.8 VDC. When the battery is nearly discharged, 90 plus percent, the terminal voltage is still around 12.8 VDC more or less. A Lead Acid battery is around 12 VDC when its at 50 percent capacity. Most mobile equipment spec's 13.8 VDC at +/- 15 percent so the low voltage cut off is at 11.5 VDC. You won't get most of the capacity out of a Lead Acid battery before the electronics starts to shut down or misbehave.
The down side to LFP batteries is the cost and you need a special LFP charger for them. If you do buy a battery make sure you get a charger for it.
I also have several MPPT charge controllers for solar panels. The charge controllers are used to keep the battery packs up.
The link below is for a company that is friendly to two-way radio users for batteries and chargers. I have one of the 6 amp-hour packs for portable handheld radios and one of the 40 amp-hour ones for fixed location use.
The charge controllers I have are from this company below. I have several of the GV-5 charge controllers for LFP batteries.
The company below has decent prices on solar panels. I have a couple of the 50 watt, one 30 watt, and a couple of the 10 watt mono crystalline panels.
If anybody has a need for a pure sine wave inverter this company has some good products. I have the 300 watt version with a builtin GFI.
For connections I use Anderson Power Pole connectors. A good source is from Powerwerx. Also one or two of the DC inline power meters comes in handy too.