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FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Tuesday, Nov 3
At a glance
- Condition
- New
- Size
- 12V 20AH Plus
- Model
- YD1220
- Dimensions
- 3"D x 7.1"W x 6.8"H
- Weight
- 5 lb
- Voltage
- 12.8 volts
- Terminal
- M5
- In the box
- 2PCS 12 AWG Cables with M5 Ring TerminalBattery with screwsUser manual
Features 6
- Premium A-Grade Cells with Robust 30A BMS: Engineered for reliability, ERYY 12V lithium iron phosphate battery is built with top-tier A-Grade cells for 5000+ cycles (10+ years!) and stable performance from -20C to 60C. The advanced 30A BMS provides ultimate protection against overcharge, over-discharge, short circuits, and overheating, while balancing cells for maximum efficiency and lifespan. Reliably powers fish finders, portable outdoor speakers, car vacuum cleaners, and more as a 12V deep cycle marine battery
- Lightweight Lead-Acid Upgrade for RVs and Solar: The ERYY 12V 20Ah lithium battery weighs just 5.5 lbs (1/3 of lead-acid) and measures 7.1"3"6.8" (half the size), yet delivers 5,000+ deep cycles (10+ years!). Equipped with BMS protection for reliable, safe and consistent power output. Suitable for camping lights and UPS backup. No maintenance, 2x faster charging, and 100% usable capacity vs. 50% in lead-acid
- Superior 12V LiFePO4 Battery with Enhanced Capacity: Upgrade to ERYY 12V 20Ah LiFePO4 lithium battery with true 22Ah capacity more power for your off-grid storage systems and marine trolling motors. Our advanced 30A BMS ensures safer operation vs. typical 20A systems. The built-in LCD voltage meter gives you real-time power monitoring. Includes 212 AWG premium battery cables, plus 5000+ cycles lifespan ideal for serious boaters and off-grid living
- 4P4S Expandable Power Configuration: Unlock custom power with ERYY 12V lithium battery! Carefully series/parallel connect up to 4P4S (48V/80Ah/4096Wh max) using identical 12V batteries to boost voltage (24V/36V/48V) or extend capacity. Suitable for scaling systems for router, security systems, water pumps, and car refrigerators. For safe expansion: Use batteries with the same capacity (20Ah), voltage (12V), BMS (30A), and brand (ERYY). Before connecting in series or parallel, each individual battery must be fully charged (with a resting voltage 13.4V)
- 12V 20Ah Rechargeable LiFePO4 Battery 3 Versatile Charging Methods! Power your adventures with ERYY 12V Rechargeable Marine Battery - the ultimate energy solution for off-grid living and mobile power needs. Engineered for versatility, it supports THREE smart charging methods: 1) Standard LiFePO4 charger (10A), 2) Solar panels with MPPT controller (LiFePO4 compatible), and 3) Generator pairing with LiFePO4 charger. Ideal for solar energy storage systems, emergency lighting, and kids' ride-on cars. Features safe operation within 32F-113F charging temperatures and 14.4V0.2 voltage. Delivers stable power with 30A charge/discharge current. NOTE: NEVER use lead-acid battery chargers
- Ideal Gift for RV & Outdoor Enthusiasts: Make holiday shopping easy with the ERYY 12V fish finder LiFePO4 battery. Perfect for dad, husband, or any handyman who enjoys RV trips, fishing, and solar DIY projects. Lightweight (5.5 lbs, 1/3 of lead-acid), 5000+ cycles (10+ years), BMS protection, and 100% usable capacity. A practical upgrade that delivers reliable off-grid power
Description
Power your mini-fridge, lights and gadgets outdoors. Enjoy quiet, fume-free freedom on the go. Quietly powers your roof fan, interior lights, portable fridge, and device charging, enhancing your camping comfort. Provide extended runtime and peace of mind for power wheelchairs, scooters, and other essential mobility equipment. power festive campsite lights, a small electric blanket, or a kettle during your winter camping trip. Keep your laptop, tablet, and smartphones powered for extended work or study sessions in the park, cafe, or during travel. Provides long-lasting backup power for multi-camera CCTV systems, NAS storage, and routers during outages. Serves as backup power during outages for routers, phones, lights, etc. Power high-output speakers, projectors, and party lights anywhere to turn any spot into an entertainment venue. Reliably powers your fish finder, GPS unit, and LED fishing light all day long. Pairs efficiently with solar panels to store green energy, ideal for powering LED patio lights or small garden fountain pumps. Powers high-wattage video LEDs, monitors and track systems for professional shoots, meeting all-day production power needs.
Specs 23
| Brand | ERYY |
|---|---|
| Vehicle Service Type | Camping Light, Fish Finder, Lawn Mower, Solar energy storage, UPS backup, outdoor speakers, security systems, trolling motor, vacuum cleaners |
| Size | 12V 20AH Plus |
| Voltage | 12.8 volts |
| Battery Cell Composition | Lithium Ion |
| Item Weight | 5 pounds |
| Product Dimensions | 3"D x 7.1"W x 6.8"H |
| Number Of Cells | 1 |
| Terminal | M5 |
| Battery Capacity | 20 Ah |
| Compatible with Vehicle Type | Camping Light, Fish Finder, Lawn Mower, Solar energy storage, UPS backup, outdoor speakers, security systems, trolling motor, vacuum cleaners |
| Automotive Fit Type | Universal Fit |
| Item Dimensions D x W x H | 3"D x 7.1"W x 6.8"H |
| Battery Type | Lithium Ion |
| Brand Name | ERYY |
| Manufacturer Part Number | YD1220 |
| Item Highlight | Grade A Cells, 5000+ Deep Cycles, Lightweight Rechargeable Lithium Iron Phosphate Battery for Fish Finder, Lights, Solar |
| Unit Count | 1 Count |
| Model Number | YD1220 |
| Manufacturer | Guangdong Shenyuanda New Energy Technology Co., Ltd |
| Number of Items | 1 |
| Number of Packs | 1 |
| Manufacturer Warranty Description | 1 Year Manufacturer, NOTE Splash-proof only. Damage from submersion, rain, or water exposure due to misuse is not covered by warranty. |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Nov 3
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Great small battery for adding additional capacity to my small lifepo4 battery generator
Size: 12V 20AH Plus
Very happy with this battery. Was surprise to see it came fully charged. I like the built in volt gauge. It will be connected to my dedicated power station used to keep up router up. Added capacity for no power days.
Reviewed in the United States on September 1, 2026 by Stephen Blandino
This is a good product
Size: 12V 20AH Plus
It is nice works great and very compact and light
Reviewed in the United States on August 18, 2026 by Amazon Customer
Cost effective Trolling Motor Power Source
Size: 12V 20AH Plus
Great little batteries for use with a small trolling motor on my small canoe. I put two together for 40ah. Plenty of reserve capacity for a day on the water.
Reviewed in the United States on September 22, 2026 by Amazon Customer
Stopped working after a month
Size: 12V 20AH Plus
The BMS stopped working after less than a month of use. It will hold a charge for 24h and then will stop working. If I connect it to a charger, it starts working again, and then dies if not used in a day or two. Terrible product.
Reviewed in the United States on August 16, 2026 by dcb87
Fit and work great
Size: 12V 20AH Plus
Great battery for the value, I installed 4 of these into my mother in laws scooter this replacing the oem x2 agm batteries that are very heavy. All 4 of these combined weight same as just 1 of the agm batteries I took out, they also increased her range by 300% over the agm. Paired with a proper charger these should last several years
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Reviewed in the United States on May 5, 2026 by Brittany
Excellent Battery
Size: 12V 20AH Plus
Runs my ham rig for a couple of days. Like the built in voltage meter!
Reviewed in the United States on July 28, 2026 by GeorgeW
It was charged
Size: 12V 20AH Plus
Weight was perfect. Fit just great and the quality of the battery was awesome. It was charged when received.
Reviewed in the United States on August 19, 2026 by mike h.
Nice
Size: 12V 20AH Plus
Good fit
Reviewed in the United States on September 26, 2026 by Joseph V. Pulizzi