Battery, Group 31 1231MF 7T31 Marine Semi Truck Solar



In stock

SKU: 1231MF/7T31-2nd Category: Brand:


Limited supply! Group 31 battery. Tested to 100% capacity sold as an unbranded 2nd. Local pickup only, customer will turn in their core, otherwise cost is $140. Mixed stock of 1231MF and Deep Cycle 7T31.

All of our battery inventory is live at CascadeGerman DOT com.

-Brand – Sold as 2nds, made by East Penn. There are only 3 manufacturers of batteries in the world – East Penn, Johnson Controls and Stryten. They put the sticker of whomever you buy it from on there, be it Bosch, Deka, Costco, VW, BMW, Varta, or whatever.
-Why are these better? – Budget batteries from Walmart, Napa and others are 3 and 4 series (value), 5 Series are the premium line, 6 series are the same as the Deka Gold line, 7 series are the premium line and 9 series are AGM. We sometimes have 5 series due to inventory but focus on 6-9 series batteries. The first number in the part number on the site tells you what series we have.
-Why are they 2nds? – because of either due to excess stock, a blemish on the casing, or often because the manufacturer, East Penn, is not allowed to charge the batteries after they are made. Because of this they have a short shelf life at the point of manufacture. Our distributor picks them up when they reach the end of the short storage life and immediately tops them off. This allows you to have a fresh battery for a big discount off normal retail cost!
-If they are 2nds are they used? – No, there is nothing wrong with them. They test above rated capacity and have never been installed on a vehicle.
-Will you ship them? – No, we will not ship these, local pickup only.
-Are there discounts for bulk purchases? – Generally no. If you want more than 10 batteries we can talk. These have a very small markup, our profit is turning in your core. Which leads us to:
-Do I have to turn in a core? –
Yes, that’s where our profit is on these. If you do not have a core the cost is $30 more.
 – We’re often asked about warranties – these batteries are sometimes half the cost of Costco and just as good. If we charged you twice as much we could offer a warranty, but because we show you it’s at 100% capacity we cannot offer warranties at this price point. If there is an issue right off the bat we’ll take care of you, but if months down the road your alternator fails, or you leave the lights on and it wipes out your battery we can’t warranty it out.
-Payment – Cash, Card, Venmo, Cash app or Apple Pay. Cash and card are easiest. If you order this and choose local pickup it will reserve you your battery and you can come in and pick it up.
-Do you have it in stock? – This listing has our current stock, if it shows in stock it should be in stock.
Where are you at?

Cascade German Parts on the corner of 8th and Cleveland with 3 big shipping containers in the lot, **Bring your core or tools to change out your battery in our parking lot**

710 NE Cleveland Ave Ste 150
Gresham 97030
M-F 8-5

**If you call us you can leave a voicemail and we’ll call you back, but we designed this listing to answer all questions so that you can just drop by and pick it up.**


Heavy duty tasks??? No matter if you need huge power for your boat, truck, bus or machinery, with the DEKA 1231MF Flooded 12V Battery you will find the best solution manufactured in USA. Designed and built to last longer even in worst condition.  With Deka, you will enjoy exceptional features and benefits  as: Genuine calcium lead alloy provides longer waterless operation and extended battery life. Anchor-locked elements with full-frame grids and tight-packed commercial plates resist the damaging effects of vibration, delivering more power-per-pound than other batteries.  Most of our commercial batteries contain premium “deep pocket” envelope separators, which protect the plates on all four sides to dramatically reduce shorting and extend service life. Special computer-aided design and manufacturing means more durability for heavy-duty line-haul trucks, buses, farm tractors and off-road equipment. Deka Commercial Batteries are available wet and many can be ordered bone-dry. Our special dry-charge process completely eliminates moisture for virtually unlimited shelf life when compared to inferior “moist-dry” types. Most popular sizes feature tough polypropylene cases which resist breakage and extend service life. Many are also available with handles and special terminals for easy installation. Deka offers the most complete line of enveloped calcium maintenance-free commercial batteries in the industry. Our line includes such hard-to-find group sizes as 5D. More than 250 quality control checks ensure the highest quality.DIMENSIONS:
Lenght: 12.99in (330.00 mm)
Width: 6.73in (171.00 mm)
Height: 9.49in (241.00 mm)
Weight: 59.00lb (26.76 kg)

@25 amps: 185 min

Additional information

Weight 85 lbs
Dimensions 12.99 × 6.73 × 9.49 in








Reserve Capacity

175 min @ 25 amps

Detailed Dimensions

Lenght: 12.99in (330.00 mm)
Width: 6.73in (171.00 mm)
Height: 9.49in (241.00 mm)
Weight: 57.00lb (25.85 kg)