Best Battery Box For Two Litime 12V 320Ah Mini LiFePO4 Batteries
Updated 10/02/2026 | Published 09/03/2026 >
Question:
I have two Litime 12V 320Ah Mini LiFePO4 Battery with Self-Heating for RV - Dimensions: 14.49 × 7.44 × 10.63 in, only 57.3lbs I am looking for a lockable aluminum preferably black batter box that I can mount to the A-Frame on my travel trailer tongue assemble between the front of my coach and after my two-propane tank cover. Alternatively, if thats not possible, I would mount them inside my front pass-through across from my inverter. A. Can you recommend a lockable box that fits these 2 batteries that I can mount to my trailer A-Frame? B. Can you recommend a box that needing to be locked that I could mount inside my pass-through for these 2 batteries?
asked by: Ted H
Expert Reply:
Hey Ted, thanks for reaching out. For your two Litime 12V 320Ah Mini LiFePO4 batteries, I recommend the TorkLift PowerArmor Locking Battery Box # TLA7700L. It has internal dimensions of 31" long x 7-5/8" wide x 12-7/8" deep, so your two 14.49" x 7.44" batteries will fit side-by-side with enough room for the battery connections.
This is a really nice option for mounting on the trailer A-frame if you have the space between the propane tanks and the front of the trailer. The outside dimensions of the box are 32" long x 10-1/2" wide x 13-1/4" tall. It is made from aluminum, has a locking lid to protect those expensive lithium batteries, and the lid also doubles as a storage tray. The box itself is black, and the aluminum construction gives you excellent corrosion resistance for an exposed tongue-mounted installation.
Before ordering, I recommend measuring the available space on the A-frame to make sure the 32" box clears the propane cover, trailer body, jack, and anything else mounted on the tongue. If space is too tight, mounting the batteries inside the front pass-through near the inverter is also a great option and has the added benefit of keeping the batteries protected from weather and shortening the high-current cable run to the inverter.
How much room do you have between the propane cover and the front wall of the trailer?

Warren
9/9/2026
Bought and installed spring of 2024. This is by far one of my better adds on the trailer. We'll built box easy to install and easy to remove the batteries and store for winter. Hauled the trailer over 3000 miles this summer with no worries.

Gary T.
9/9/2026
I mounted mine on the A-frame just behind the propane tanks and in front of the trailer basement compartment. It barely squeezed in. My trailer is a 2023 Micro Minnie Winnebago 1720FB. The box now holds 4 Renogy 100Ah Core Lithium batteries. It had space left over which I use to store electric items. The mounting was done with self-tapping bolts. I am going to watch those closely since I have read comments online that self-tapping bolts can shake loose over time. Double check the battery box interior measurements before you buy. The battery cable length also comes into play so be sure you have slack or be prepared to add a bus-bar. This did add some weight to the hitch, but nothing that affected handling. So far it seems to work well.

Ted H.
10/2/2026
Hi Jesse M, thank you for your response. My LiTime 320Ah batteries didn't fit in the TorkLift PowerArmor Locking Battery Box #TLA7700L. There are three horizontal braces in the box, two at the ends and one in the middle. These help tie down the battery to prevent vertical movement. As I drop in the LiTime 320Ah battery, it fits half way down until it was wedged in by the end and middle horizontal brace. I doesn't reach the bottom of the box. I spoke to Torklift on the phone. Aside, I found Torklift to be an excellent company with excellent customer service. The boxes have a manufacturing tolerance of about 3/16" meaning the difference in dimension between the LiTime 320Ah batteries and the box are too tight to accommodate the reasonable manufacturing process associated with producing the box. In short, the box didn't work for my 2 LiTime 320Ah batteries. You need to measure each of the two openings where the battery will be placed in the box being shipped to you to ensure the actual battery dimensions will fit in the A7700L. This will ensure all works in view of the expected manufacturing tolerances. I'm told by Torklift there engineering team is working toward producing new boxes that specifically accommodate the larger lithium batteries now on the market, so I trust they will have PowerArmor products that better aligned to the larger lithium batteries in the future. For now, I resorted to two NOCO battery trays secured inside my front pass-through compartment positioned perpendicular to the front of my 2026 Winnebago Micro Minnie 2108DS coach for weight balancing. This worked for me and my rig. I mounted my Renogy 2000W inverter on the aluminum beams above the batteries to keep everything centered. The Torklift A7700L is very well made, durable, and sturdy but regretfully, is not a fit for 2 LiTime 320Ah batteries.

Product Page this Question was Asked From
TorkLift PowerArmor Locking Battery Box - 6V and 12V Lithium Batteries - Powder Coated Aluminum
- Battery Boxes
- Camper Battery Box
- Trailer Battery Box
- 12V
- 6V
- 2 Batteries
- Lockable
- Aluminum
- TorkLift
more information >
Continue Researching
- Shop: TorkLift PowerArmor Locking Battery Box - 6V and 12V Lithium Batteries - Powder Coated Aluminum
- Q&A: Will Group 31 Batteries Fit TorkLift PowerArmor Locking Battery Box
- Q&A: Installation Methods for TorkLift PowerArmor Locking Battery Box
- Q&A: Can Furrion Vision S+ Be Used As Rear View Mirror
- Q&A: Looking to see how the Torklift PowerArmor locking Battery Box Mounted to a Trailer Tongue?
- Q&A: Replacement Head and Spring Bars For 20k Blue Ox SwayPro
- Q&A: How Much Weight Can TorkLift PowerArmor Locking Battery Box Hold On Top
- Q&A: Is etrailer Part # PD69RR the Progressive Dynamics PD9345V Converter Charger?
- Article: 30-Amp and 50-Amp RV Service: What's the Difference?
- Article: Trailer Wiring Diagrams
- Article: Spring Towing Readiness Checklist
- Article: What RV AC Will Work With Your Setup? Avoid Costly Mistakes Before You Order
- Article: Which Sway Control Hitch is Right For Your Trailer?
- Article: How Much Solar Power Do I Need For My RV?
- Article: Does Solar Panel Type Really Matter?



Erik
9/9/2026
Really like mine. It didn't line up on my rv tounge to do the easiest hookup but enough different connection options offered I was able to put it on fairly easy.