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Miady 12V 12Ah Rechargeable Sealed Lead Acid Battery (2 Pack)

Curated from 43 real Reddit conversations

Refreshed on: February 1, 2025

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Miady 12V 12Ah Rechargeable Sealed Lead Acid Battery (2 Pack)

Brand: Miady
Price: $49
Snoop Score:
6.3
Sentiment
5.0
Popularity
5.0
Technical
7.2
Buy on Amazon for $49See All 12V Reviews
As an Amazon Associate, I earn from qualifying purchases.

Snoop's Take

The Miady 12V 12Ah Rechargeable Sealed Lead Acid Battery (2 Pack) is a reliable, compact power solution tailored for devices that demand a steady 12V supply. Engineered with maintenance-free, spill-proof AGM technology, it is designed for users who need hassle-free performance in everyday applications. Community sentiment reveals both admiration for its performance and criticism over its pricing strategy. One reviewer noted, “I've been running it for 2 weeks now, zero issues,” underscoring reliable operation, yet others decry its cost when compared to OEM alternatives. The feedback highlights that while the core functionality stands strong, the price point might dissuade some users. This mix of praise and critique reflects a balanced debate among experts and everyday users alike. In conclusion, if you are seeking a consistent, maintenance-free battery for home security, LED lighting, or backup power, the Miady battery is a solid choice despite its higher cost. Its dependable performance makes it a recommended option for those prioritizing longevity and stability in critical applications.

Not for you? Check out our other rated 12V

Do you have a multimeter? Have you tested output voltage?

Insightful Chatter

You picked a really pricey option as a swap in replacement for the OEM 12V AGM.

Negative Feedback
Product
6.3
Miady 12V 12Ah Rechargeable Sealed Lead Acid Battery (2 Pack)
Buy on Amazon for $49
Home Security Devices
8 / 10
LED Lighting Systems
4 / 10
Automotive Accessories
6 / 10
Emergency Backup
10 / 10
See how this compares to all 12V

Where it needs some work!

Areas to watch—feedback on possible improvements.
High price compared to OEM
“You picked a really pricey option as a swap in replacement for the OEM 12V AGM.”➕

Compare On All Talked About Dimensions

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Miady 12V 12Ah Rechargeable Sealed Lead Acid Battery (2 Pack)Miady 12V 12Ah Rechargeable Sealed Lead Acid Battery (2 Pack)$49
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Core Power Plays

The specs and strengths that make it shine.
General rechargeable battery performance comparisons
“Tenergy Pro beats everything I've found right now.”➕
“3.5 hours is much greater than 3h.”➕
Technical wiring advice for USB/cigarette lighter connections
“First thing to check obviously is the polarity.”➕
“I suppose it could be a surge and if connecting it directly to the battery it would reduce that.”➕
“I didn't fuse connections but will add some in the future.”➕
“Are the built in USB ports limited to 2A (fuse or breaker) and your USB charger trying to pull 5A?”➕

Hidden Hero Hacks

Unexpected tricks and side‑door uses you’ll love.
Discussion on power injection strategies for LED strips
“Is what I’m wanting to do possible?”➕
“you can easily feed it power from both ends, i. e. you're cutting the length in half and 7m is perfectly fine for 24V”➕
“24V is going to be better as it will require power injecting only from beginning and end.”➕
User-created insulating case for cold weather
“I needed to insulate it to charge it outside during the winter.”➕

Buyer’s Cheat Sheet

What to check before you click ‘Add to Cart.’
Advice on checking battery voltage under load
“Do you have a multimeter? Have you tested output voltage?”➕
“This!!! Are are the batteries outputting 18+ volts??”➕
“The older one reads 12.52 and the newer 12.76.”➕
“Well that seems good, you should have 24v across the red in black in the picture then.”➕
Charger configuration and safety advice for Miady batteries
“Just be sure the correct battery is selected, the light should be next to LiFePO4 and you should be good.”➕
“Lithium phosphate cells are incombustible in the event of mishandling during charge or discharge.”➕
“Current is determined by the voltage and the resistance of the load.”➕
“Much less opportunity to accidentally short things, just need to make sure you've got the correct polarity when connecting to the battery.”➕
Battery capacity de-rating advice
“De-rate battery capacity by half to get a realistic swag number for Operation Time.”➕
Optimal MPPT charge controller settings for LiFePO4 batteries
“this Rover Li controller isn't actually configured for LiFePO4, which I found a little confusing.”➕
“I'm struggling a bit.”➕
Battery disconnection requirements for AC charging in solar setups
“But is disconnecting first actually necessary?”➕

Cautionary Callouts

Know the pitfalls before they catch you off guard.
Software update impact on 12V port functionality
“this makes it kind of useless when it goes off all the time even when I previously used sentry to make sure it does stay on.”➕
“this is a really bad update, I've relied on constant 12v for my dash cam and fridge for years.”➕
Safety concerns and modifications for SMPS voltage changes
“What do I need to change to turn this 24V SMPS into 12V?”➕
“Buy the 12 Volt version”➕
“NEVER MESS WITH POWER SUPPLIES!”➕
Warning on low discharge ratings in small LiFePO4 batteries
“Believe the 16ah is the first milady rated for sufficient discharge (I own the 16ah and it's worked flawlessly through 5 field days and a dozen pota type outings now BTW).”➕
Cold weather charging caution for lithium batteries
“Awesome swap. I wish I could do it on my car too.”➕

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