WEIZE BAC-0089-2 LiFePO4 Battery Review: Cuts Off in Cold Weather for Safer Charging

The BAC-0089-2 in Short

WEIZE BAC-0089-2 delivers 100Ah in the WEIZE 12V 100Ah LiFePO4 Battery format for you if you need a 12V 100Ah LiFePO4 battery.

If your battery bay needs marine terminals, the connector choice can decide the install before capacity does.

WEIZE BAC-0089-2 answers that fit question with a marine terminal and 100Ah in a 12V LiFePO4 battery. BAC-0089-2 also lists series/parallel support, low-temperature charging protection, and a built-in BMS. The listing price is around $302, and the buyer score is 4.3 from 1,336 ratings.

We screened 55 LiFePO4 batteries and selected 15 for full review. Full reviews go to the most-rated products that pass screening, with at most two per brand. This one has 1,336 buyer ratings, the second-highest count among the 55 screened.

The Short Answer on the BAC-0089-2

Best for: you need a 12V LiFePO4 battery with low-temperature charging protection and series/parallel support for a small off-grid or backup setup.

BAC-0089-2 is a reasonable buy around $302 if you want 100Ah in the 12V format and need the built-in BMS and cold-weather cutoff.

• Pro: Its 100Ah capacity gives you the standard 12V LiFePO4 baseline used for trolling motors, RV house loads, and solar storage.
• Pro: Low-temperature charging protection helps prevent charging in cold conditions, which matters for winter storage and outdoor use.
• Pro: The built-in BMS and series/parallel support make it easier to fit into a basic lithium setup.
• Con: A 26.4-pound battery is not light for portable carry, so frequent lifting or swapping gets less convenient.
• Con: One 100Ah pack is short of the 200Ah reference point, so you should not expect it to cover larger off-grid loads by itself.

Don’t buy this if: you need a single battery to handle a 200Ah-class off-grid load or a 280Ah-style extended runtime setup.

Price assessment: $302 is fair for a 100Ah 12V LiFePO4 battery with low-temperature protection and a built-in BMS.

If you are building a remote retreat, find the best lifepo4 battery for an off-grid cabin here.

Key Specifications for this LiFePO4 battery

Capacity most separates this BAC-0089-2 from other deciding specs. Capacity measures how much charge the battery can store and deliver over time.

Before You Buy: LFP battery Checklist

The first thing to check is your system voltage, because this battery is a 12V LiFePO4 model. If your charger or equipment is built for another voltage, you will need a different battery.

• ☐ Confirm your system is 12V — BAC-0089-2 is a 12V battery, and a mismatch means you cannot use it as a direct replacement.
• ☐ Check your available capacity need — 100Ah gives you a modest reserve, so undersizing it means shorter runtime and an earlier recharge.
• ☐ Measure the space and weight limit — 26.4 pounds is the listed weight, and a tight mount or carry limit can make installation awkward or force a different battery.
• ☐ Check for low-temperature charging protection — low-temperature charging protection is stated, and without it you risk charging in cold conditions that can damage the pack.
• ☐ Confirm your current draw stays within the battery’s BMS limits — the built-in BMS is there to protect against over-current, and an oversized inverter surge or motor load can trip the battery off.

This battery can work as a drop-in replacement only if your setup is 12V and your charger is set up for lithium charging. If you need more than 100Ah or your cold-weather use depends on unstated charging behavior, you should not buy it.

What the Numbers Mean in Use

How low-temperature charging protection works in winter

BAC-0089-2 includes low-temperature charging protection, so you can use it in winter without risking a charge cycle in freezing conditions. That matters because this 12V LiFePO4 format is often chosen for seasonal storage, and the cutoff keeps charging from starting when the pack is too cold.

The protection is a charge-side limit, not a capacity boost, so your usable power still comes from the 100Ah rating and the 12V nominal format. If your setup needs winter charging, this pack gives you that safeguard; if your charging source must work below 0°C, you need a different battery or a warmer charging environment.

Why this battery’s cycle life suits repeated daily use

BAC-0089-2 is listed at more than 2,000 cycles at 100% depth of discharge and 8,000 cycles at 50% depth of discharge, so you can plan for repeated daily use instead of short-term backup. That cycle range favors buyers who want a battery that can stay in service through many charge and discharge rounds.

The trade-off is that cycle life does not change the stored charge in the pack, which remains 100Ah. If your use case is a CPAP overnight, the battery can cover about 0.7 to 1 night at the lighter end of an 80 to 120Ah need, but larger loads still outgrow that capacity.

Why this deep-cycle battery is easier to move

BAC-0089-2 weighs 26.4 pounds, so you get a 12V deep-cycle battery that is easier to move than many lead-acid replacements. That lower weight helps when you need a single battery for portable solar, a trolling motor, or a van setup where lifting and placement matter.

The lighter build does not change the pack’s 100Ah capacity, and that is the figure that sets runtime. For a weekend RV trip, the battery is short of the 3-day need, and for a half-day trolling motor run it lands around 3 to 5.5 hours, so you need to size the rest of the system around that limit.

Which Jobs the BAC-0089-2 Handles, Worked Out From Its Specs

The BAC-0089-2 against the jobs buyers ask about, worked out from its listed capacity and a typical need for each job.

Travelers should explore the best lifepo4 battery for van camping to ensure reliable mobile power.

How the BAC-0089-2 Compares to Alternatives

If you want a 12V, 100Ah LiFePO4 battery, BAC-0089-2 gives you that core spec for around $302. It also includes low-temperature charging protection, a built-in BMS, and series/parallel support.

• Compared with the Cymoye 24V 100Ah LiFePO4 Battery, BAC-0089-2 uses 12V instead of 24V. That makes it the closer fit for 12V systems.
• Against the GREENOE 12V 100Ah LiFePO4 Battery, BAC-0089-2 is $17.90 cheaper. Both list the same 100Ah capacity, so price is the separator here.
• Timeusb Li-Battery01 12V 140Ah lists more capacity at 140Ah. Choose that one if your load needs more stored charge than 100Ah provides.
• BtrPower YX12100-LF 12V 100Ah lists 12.8V nominal voltage, while BAC-0089-2 states 12V. If your setup is built around the standard 12V figure, this WEIZE model is the cleaner match.
• Compared with the 12V 300Ah LiFePO4 Battery, BAC-0089-2 is $24.98 less expensive. The 300Ah model is the stronger pick when capacity matters more than upfront cost.
• On buyer ratings, BAC-0089-2 ranks 4th highest-rated of the six compared products, with a 4.3 average from 1,336 ratings. That puts it behind the higher-rated options in this set.

If you need more stored energy than 100Ah, the Timeusb Li-Battery01 12V 140Ah is the better pick. It gives you a larger capacity without moving to the 300Ah price tier.

You can also view our full review of the LiTime 100Ah for a detailed spec breakdown.

For a different brand, see our spec breakdown of the JITA-01 to compare performance.

Is the price right for a 100Ah 12V battery?

At around $302, BAC-0089-2 sits $8 below the $310 average for the similar lifepo4 battery products we compared it against. It gives you 100Ah at 12V, so you are paying for a standard 12.8V-style drop-in size without moving into the larger 200Ah class.

What do you give up at this price point? The 26.4-pound weight is not the lightest option in the field, and the pack still ships as a single battery. The built-in BMS, low-temperature charging protection, and series/parallel support matter more here than the rating alone, because those features shape how easily the battery fits a real system.

Choose this one if you want a 100Ah, 12V LiFePO4 battery with cold-weather charging protection and you do not need the extra capacity of a 200Ah pack. It also makes sense if you want marine terminals and a single-battery purchase, since the listing states one battery per pack.

Getting the BAC-0089-2 Working, and What to Check After

Getting the BAC-0089-2 ready for first use

You need a 12V charging source before the BAC-0089-2 can do anything useful.

1. Unpack the battery and confirm the 12V nominal voltage on the label.
2. Place it in a battery box sized for a 26.4-pound battery if you are using one.
3. Connect a battery charger set for 12V lithium charging, since this pack calls for a dedicated lithium charger.
4. Attach the marine terminal leads with the correct polarity before powering the circuit.
5. Use only one battery if your setup does not need series or parallel wiring, since this pack is sold as a single battery and supports up to 4 in series or parallel.

Warranty and support: what to verify for BAC-0089-2

Cover differs by seller and country.

• Confirm the return window before it closes, because the built-in BMS is not user-serviceable.
• Confirm whether low-temperature charging protection is covered, since that feature affects cold-weather use.
• Confirm whether the marine terminal connection is covered for fit issues, because terminal type affects cable compatibility.
• Confirm whether the 26.4-pound unit is covered for shipping damage, because replacement shipping can be costly on a battery this size.

Check the battery’s label and the seller’s return terms the day it arrives.

What Buyers Still Want to Know About This LiFePO4 battery

Can I wire more than one of these together, and what is the limit?

Yes, BAC-0089-2 supports series and parallel wiring, and the stated limit is four batteries. That means you can build a larger bank later, but you should stay within the 4-battery limit named in the listing.

Is the marine terminal the right terminal style for my cables and connectors?

Marine terminal is the terminal style on BAC-0089-2, so it fits cable ends and connectors made for that format. If your existing lugs or connectors are built for a different terminal style, you will need a matching connection method.

How much capacity does the WEIZE BAC-0089-2 12V 100Ah lifepo4 battery have?

BAC-0089-2 is a 100Ah battery with a 12V nominal rating. That is the common starting point for a 12V LiFePO4 battery used in trolling motors, RV house loads, and solar storage.

Will the WEIZE BAC-0089-2 12V 100Ah lifepo4 battery work for a CPAP machine overnight?

Yes, BAC-0089-2 can cover about 0.7 to 1 night for a CPAP machine, using the 80 to 120Ah range and 85% usable capacity assumption. The lighter end of that range reaches one night; the heavier end does not.

What does the low-temperature charging protection do on the WEIZE BAC-0089-2 12V 100Ah lifepo4 battery?

BAC-0089-2 states low-temperature charging protection, which matters because charging below 0°C can damage lithium cells. That feature helps rule out charging in cold conditions, but the listing does not state the exact cutoff temperature.

Research the alternatives to an LiFePO4 battery if you are considering different energy storage technologies.

Is the BAC-0089-2 Right for You?

Who the BAC-0089-2 suits and the jobs it is the wrong choice for, listed below with the reason for each.

Where to Buy This Lithium Iron Phosphate Battery

Lifepo4 batteries are sold by the retailers below – we do not track which of them has the BAC-0089-2 in stock, so check availability and the current price with the retailer before making a trip.

• Northern Tool (online and physical stores) — business and trade accounts
• Amazon (online only) — breadth of range
• Home Depot (online and physical stores) — in-store returns
• Walmart (online and physical stores) — broad marketplace assortment
• Battery Mart (online only) — specialist staff
• Renogy (online only) — specialist retailer for lithium batteries and solar storage
• Eco-Worthy (online only) — specialist retailer for lithium batteries and off-grid power

Final Verdict on the BAC-0089-2

You should choose the BAC-0089-2 if you need a 12V, 100Ah LFP battery for lighter-duty off-grid use and you want low-temperature charging protection. Around $302 makes it a straightforward pick when you want the standard 12.8V format, built-in BMS protection, and one battery in the pack.

The 100Ah capacity is the key number here. It gives you enough stored charge for many small 12V jobs, but it is still short of the larger reserve that multi-day RV use, longer trolling-motor sessions, and heavier overnight loads usually need.

Skip it if: you need a battery for a full weekend off shore power, a half-day trolling motor run, or a cabin setup that needs one night with a small inverter load.