Weize LFP1235/TL1235 12V 35Ah Deep Cycle Battery

Weize 12V 35Ah deep cycle battery is a very popular, general-purpose BCI U1 Group battery, often used in backup systems, electric vehicles, garden tractors, as a small off-the-grid inverter battery, and similar.

Weize 12V 35Ah battery is sometimes labeled as Weize LFP1235 and sometimes as Weize TL1235 battery, but these are two practically the same batteries.

Published: January 2, 2023.

Weize 12V 35Ah LFP1235/TL1235 Battery Features and Specifications

Weize 12V 35Ah battery features physical dimensions of (L x W x H) 7.68 x 5.16 x 7.09 inches (~19.5 x 13.1 x 18.0 cm), and it weighs ~23.2 pounds (~10.5 kg), and it belongs to the BCI U1 battery group.

The battery comes with a handle, allowing a single person to carry it to shorter distances and position it easily in its permanent location.

Weize 12V 35Ah battery is an Absorbent Glass Mat (AGM), Valve-Regulated (VRLA), and Sealed Lead-Acid (SLA) deep cycle battery.

Thanks to the AGM technology, the battery is a spill-proof, maintenance-free battery that can operate in almost any position except upside down.

Note: Personally, keep it in an upright position, and if You need a U1 battery that will operate on its side or even upside down position, go for a lithium U1 battery.

The battery features a positive terminal on the left side and a negative on the right side - the terminals are "nuts and bolts" type with nuts and bolts being included.

Weize 12V 35Ah battery features a nominal voltage of 12V and a 10h capacity of 35Ah. Its nominal 20h capacity is around 37Ah.

Despite being a deep cycle battery, the Weize 12V 35Ah battery is often used as starting battery for smaller gasoline engines, often found in lawn and garden tools and tractors, power generators, backup systems, and similar - the battery is able to provide 300+ Amps for 3-5 seconds without issues.

However, if after 2-3 cranks the engine doesn't start, give it a few minutes for the battery to rest a little bit.

Note: Yes, the batteries need to rest - when they are being discharged with strong currents, sulfate acid concentration near the plates decreases, increasing the internal resistance of the battery and decreasing the battery's ability to crank the engine.

When the engine starts, let the onboard alternator/charge controller fully recharge the battery.

How To Charge Weize 12V 35Ah Battery

So, when the battery is connected to the vehicle, tractor, power generator, etc., which already has a battery charging system (most often in the form of the alternator and charge controller), let the battery charging system keep the battery fully charged.

However, when the battery is being charged with a battery charger, then:

• when the battery is used in a cyclic application, the charging voltage should be 14.50-14.90V,
• when the battery is used in a standby application, the charging voltage should be 13.50-13.80V.

The maximum initial charging current should be 10.5 Amps or less, regardless of the charging voltage or battery application.

One of the recommended battery chargers for Weize 12V 35Ah battery is NOCO Genius 5 battery charger - this is an advanced wet/flooded AGM and lithium battery charger that can recover even deeply discharged batteries.

Also, after fully recharging the batteries, NOCO Genius 5 switches itself to the maintenance mode, keeping the battery fully charged.

For example, if the Weize 12V 35Ah battery is discharged from 35Ah to 10Ah (25Ah required), it takes NOCO Genius 5 slightly less than 6 hours to analyze and fully recharge the Weize 12V 35Ah battery.

Note: this charging time greatly depends on the battery condition too. If the battery is heavily sulfated, the charging time will be longer.

For more reviews and recommendations, feel free to check the NOCO Genius 5 Battery Charger Amazon link (the link opens in the new window).

When being off-the-grid, the Weize 12V 35Ah battery can be recharged using solar panels and the battery charge controller, which supports charging of the AGM battery - just be sure to limit the charging current to 7-8 Amps max.

Weize 12V 35Ah Battery As Trolling Motor Battery

Weize 12V 35Ah battery can be used as a cheap and reliable trolling motor battery for trolling motors up to 30 pounds which features a maximum current draw of 25-30 Amps.

Brand new, fully charged Weize 12V 35Ah battery is able to provide ~20 Amps for an hour without being discharged down to 100% DoD.

Note: if You are pushing your 30-pound trolling motor at full throttle all the time, your trolling motor is seriously underpowered - get a new one, preferably in the 55-60 lbs range, which also requires a larger trolling motor battery, group 27 or group 31 batteries being recommended.

So, if You are looking for a 12V 30-40Ah lead-acid trolling motor battery Weize 12V 35Ah battery combined with NOCO Genius 5 Battery Charger is an excellent combination.

Weize 12V 35Ah Battery As Inverter Battery

Weize 12V 35Ah battery is often used as an inverter battery in backup systems, when camping, in emergencies and blackouts, and similar.

As such, it can provide, for example, 3.5 Amps for 10 hours (down to 10.5 volts).

Just before being fully discharged, the battery provides ~37 Watts, and when a 90% energy-efficient power inverter is used, it can provide ~33W to the external loads. Of course, the output power was stronger at the beginning of the discharge cycle.

33-35W doesn't sound much, but it is enough to recharge smartphones, tablets or even to run a small LED/LCD TV (without chargers being used).

When the battery is being discharged at a rate of 20 Amps, at the end of the discharge cycle (10.5V), the battery provides 210 Watts, and when a 90% energy-efficient power inverter is used, it can provide ~190W to the external loads.

190W for an hour is plenty of power, allowing the user to power smaller telecommunications devices (WiFi routers and similar) and charge laptops, tablets, smartphones, and power multimedia devices, etc.

Long Story Short: Weize 12V 35Ah TL1235/LFP1235 battery is a very popular U1 battery for many reasons - it is an affordable and reliable battery, which countless users have already tested in many real-life situations, and it passed the tests with flying colors.

For more reviews and recommendations, feel free to check the Weize 12V 35Ah TL1235/LFP1235 Deep Cycle AGM Battery Amazon link (the link opens in the new window).