john a durden, would this internal regulator in each battery be a problem when put in series?

Thank you for your inquiry. The internal BMS of the battery allows for a 2s configuration for 24V, so you can put up to two of these batteries together in series without issues,

how much does each one weigh?

I didnt weigh them but the pair were lighter than one lead acid equivalent.

In your ad, 4 are connected in series for 48vdc, but elsewhere you state max 2. i need 4 in series for a smart2200rm2u ups. will these work?

The latest version of this battery does support 48V series wiring connection. However, we might not recommend using these batteries in a UPS system that has the SLA/ AGM batteries as the original batteries, because the built-in charger is designed to charge SLA/ AGM batteries that might not be able to provide LiFePO4 lithium battery sufficient charging and it might also cause damage to the batteries in long term use.

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ExpertPower 12V 10Ah Lithium LiFePO4 Deep Cycle Rechargeable Battery | 2500-7000 Life Cycles & 10-Year Lifetime | Built-in BMS

ExpertPower 12V 10Ah Lithium LiFePO4 Deep Cycle Rechargeable Battery | 2500-7000 Life Cycles & 10-Year Lifetime | Built-in BMS

Product ID: 593170322

Details

Battery Cell Composition
Lithium Ion
Brand
ExpertPower
Size
1 Count (Pack
Vehicle Service Type
Passenger Car
Voltage
12.8 Volts

⚡12.8V nominal voltage

🔋7000 life cycles max

🛡️Built-in advanced BMS

Description

🔋 Power that lasts a decade — because your hustle deserves nothing less!

UNMATCHED LONGEVITY - Up to 7000 deep cycles for a decade of reliable power
HASSLE FREE OWNERSHIP - Backed by a 1-year warranty and dedicated tech support for peace of mind
LIGHTWEIGHT POWERHOUSE - Less than half the weight of traditional lead-acid batteries for effortless portability
SMART BATTERY MANAGEMENT - Proprietary BMS guards against overcharge, overheating, and short circuits
INDUSTRY PROVEN RELIABILITY - Trusted by pros with 36 years of expertise and over a million batteries sold

The ExpertPower 12V 10Ah LiFePO4 battery delivers cutting-edge lithium-iron phosphate technology with up to 7000 life cycles and a 10-year lifespan. Featuring a built-in advanced Battery Management System, it ensures superior safety and performance while weighing less than half of traditional lead-acid batteries. Trusted by industry professionals and backed by a 1-year warranty, this rechargeable deep cycle battery is engineered for long-lasting, reliable power in home, work, and outdoor applications.

Specifications

ASIN	B07X3Y3LS5
Battery Capacity	10
Battery Composition	Lithium Ion
Brand Name	ExpertPower
Compatible with Vehicle Type	Passenger Car
Country of Origin	USA
Customer Reviews	4.0 4.0 out of 5 stars (1)
Global Trade Identification Number	00814832028954
Manufacturer	ExpertPower
Manufacturer Part Number	EP1210
Model	EP1210
Number of Items	1
Size	1 Count (Pack of 1)
Terminal	F2 Terminal
UPC	814832028954
Unit Count	1 Count
Voltage	12.8 Volts

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