> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # 12V 20Ah Lithium Iron Phosphate Battery (LiFePO4, M5) **Type:** Product page · **SKU:** ASL4551A · **Brand:** [Core Electronics](https://core-electronics.com.au/brands/core-electronics-australia) **Page:** https://core-electronics.com.au/12v-20ah-lithium-iron-phosphate-battery-lifepo4-m5.html ([markdown](https://core-electronics.com.au/12v-20ah-lithium-iron-phosphate-battery-lifepo4-m5.html.md)) ## Retired product This product is retired and no longer available for purchase. Replaced by: ASL4551BT. **Replacement:** https://core-electronics.com.au/catalog/product/view/sku/ASL4551BT ## How to buy - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## Description This 12V 20Ah LiFePO4 replacement battery is compatible in size with traditional 20Ah SLA batteries, but with all the benefits of cutting-edge lithium technology. LiFePO4 batteries offer longer service life than traditional lead acid batteries, plus weigh less than HALF as much as SLA batteries. LiFePO4 also provides more usable life per cycle, allowing for longer run times by holding a higher voltage until capacity is almost exhausted. These batteries will also maintain 80-90% charge when in storage - far higher than their lead-acid counterparts. The latest generation of maintenance-free batteries is here! Each battery is fitted with an internal battery management system to provide safe charging and discharging at all times. This system provides internal short circuit, over temperature and under/over voltage cut off. **Factory supplied at 30% charge for safety compliance. Must be charged fully before use.** **Excessive temperatures over 65ºC can effect the ABS housing. Need to be well ventilated in warm conditions. Not for use in engine bays.** ## Features - Internal battery management system for safe charging and discharging. - Drop in replacement for standard lead acid 20Ah batteries - Half the weight of traditional lead acid batteries. - Less discharge when in storage compared with traditional lead acid batteries. - Longer service life compared to lead acid. - Longer run time compared to lead acid. **What are LiFePO4 type batteries?** Check out our [handy article explaining the benefits of using LiFePO4 batteries.](https://www.altronics.com.au/articles/what-are-life-po4-lithium-batteries/) ## Specifications - **General** - Dimensions: 181 x 77 x 167mm - Overall Weight: 2kg - Terminal Type: M5 / F13 - Connection: 12-48V max 4 in series, no limit in parallel. - Note: When used in series each battery will need to be discharged to cut off before connecting so that all cells are all balanced. - Case Material: ABS - Case IP Rating: IP56 - Cell Type: Cylinder - Certification: CB/CE, UN38.3, UL1642 @ cell. - Shipping Class: UN3480, Class 9 - **Battery Module Specification** - Nominal Voltage: 12.8V @ 25°C, 0.2C - Capacity: 20Ah @ 25°C, 0.2C - **Operating Parameters** - Charging Voltage: 14.8V - Discharging Voltage: 11.8V - Charging Current: 20A max, Recommended 10A - Max Constant Discharge: 20A - Pulse Discharge: 75A for 30S - **Temperature** - Charge Range: 0 to 45°C - Discharge Range: -20 to 60°C - Storage Range: -20 to 45°C - **Service Life** - Design Life: >10 years @ 25°C, 0.2C - Cycle Life (25° C,0.2C): >2000 times (100% DOD to 80% end) - Cycle Life (25° C,0.5C): >4000 cycles (100% DOD to 50% end) - **BMS Parameters** - **Charging** - Cell Voltage Protection: 3.7V Delay 1-2S (Recover when discharge current >1A or cell voltage <3.38V or module voltage <13.52V) - Module Voltage Protection: 14.8V Delay 1-2S (Recover when discharge current >1A or cell voltage <3.38V or module voltage <13.52V) - Over Charging Current: 20A Delay 20-30S (Turn to pre-charge mode and try to recover in every 3 minutes) - Temperature Protection: <-10°C or >70°C, Delay 1-2S (Recovery when >0°C or <60°C) - **Discharging** - Cell Voltage protection: 2.1V Delay 500mS (Recover when charge current >1A or cell voltage >2.6V or module voltage >10.4V) - Module Voltage Protection: 8.4V Delay 1-2S (Recover when charge current >1A or cell voltage >2.6V or module voltage >10.4V) - Over Discharging Current: 55-75A Delay 500-1500mS (Recover when charging current >1A, or recover in every 60S) - Short Circuit: 200-700us (Recover when charging current >1A, or recover in every 60S) - Temperature Protection: <-20°C or >75°C, Delay 1-2S (Recovery when >-10°C or <65°C) - **BMS Features** - PCB Temp Protection: >115°C Delay 1-2S Recover when <80°C - Cell Balance: 25-45mA passive balance cell voltage difference > 45mV - Temperature Accuracy: ±2°C Cycle measurement Measuring range -40 to 100°C - Voltage Accuracy: ±20mV Cycle measurement for cells and module - Current Accuracy: FSC±5% Cycle measurement measuring range -200 to +200 - SOC: 5% (integral calculation) - Power Consumption: <300uA (switch off mode - storage), <100uA (sleep mode - protection & standby), <15mA (operating mode) \*Specifications are subject to change without notice. ### Warranty ### 5 YEARS We offer **5 years** warranty on this product from its date of purchase. This is available from Altronics stores, online purchases or Altronics resellers. In accordance with our full [warranty terms](https://www.altronics.com.au/warranty/) we will repair, replace or refund if goods you have purchased from us are defective. ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/A/S/ASL4551A-1.jpg)