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MS920T-FL27E
MS920T-FL27E
| Part Number | MS920T-FL27E |
|---|---|
| Manufacturer | Seiko Instruments (SII) |
| Category | Batteries & Power Products > Rechargeable Batteries (Secondary Cells) – Coin / Button Cell |
| Description | Rechargeable Manganese Silicon Lithium (MS) Coin Cell Battery with Tab Terminals, 3.0V Nominal Voltage, 6.5mAh Capacity, Wide Temperature Range (-40°C to +85°C) |
| Stock Status | In Stock |
| Origin | Original Factory |
Product Overview
The MS920T-FL27E is a high-reliability rechargeable Manganese Silicon Lithium (MS) coin cell battery manufactured by Seiko Instruments (SII). Equipped with factory-welded FL27E surface-mount solder tabs, this 3.0V secondary battery adopts silicon oxide negative electrode and manganese oxide positive electrode design. With outstanding charge-discharge cycle performance, it supports continuous micro-charging. Packaged in standard 920 coin cell form factor (9.5 mm × 2.0 mm), it works stably from -40°C to +85°C. Ideal for RTC, SRAM backup, smart meters, automotive telematics and compact IoT devices.
Core Advantages
Manganese Silicon (MS) Chemistry
Delivers higher energy density, stable voltage and superior discharge performance versus conventional rechargeable coin batteries.
Factory-Welded FL27E Solder Tabs
Pre-welded SMD terminals support automated PCB soldering, avoiding thermal damage to the cell body.
Built-in Overcharge Resistance & Long Cycle Life
Supports repeated deep charge/discharge cycles and stable trickle charging without capacity attenuation.
Ultra-Low Self-Discharge & High Reliability
Adopts proprietary sealing technology to reduce self-discharge and electrolyte leakage, ensuring long-term stable backup power supply.
Key Specifications
| Brand | Seiko Instruments (SII) |
|---|---|
| RoHS Status | RoHS Compliant / Lead-Free / Green |
| Warranty | 1-Year Standard Quality Warranty |
| Package / Case | Coin Cell 920 (9.5 mm Diameter × 2.0 mm Height) |
| Mounting Type | PCB Solder Tab Mount (FL27E Lead Frame Terminal Configuration) |
| Surface Marking / Silkscreen | SII MS920T Marking |
| Battery Chemistry | Rechargeable Manganese Silicon Lithium (MS) |
| Nominal Voltage | 3.0 V |
| Charging Voltage | 2.8V to 3.3V (Standard 3.1V to 3.2V) |
| Nominal Capacity | 6.5 mAh |
| Standard Discharge Current | 0.025 mA |
| Max Continuous Discharge Current | 0.4 mA |
| Cut-off Discharge Voltage | 2.0 V |
| Cycle Life | Approx. 500 cycles |
| Operating Temperature Range | -40°C to +85°C |
| Storage Temperature | -30°C ~ +45°C |
| Weight | Approx. 0.45 g |
| Packaging Format | Tape & Reel / Tray / Bulk |
Precautions
- Charging Voltage Control: Maintain charging voltage within 2.8V ~ 3.3V (nominal 3.1V-3.2V). Voltage exceeding 3.4V will degrade capacity and cause permanent internal damage.
- Do Not Directly Solder Cell Body: Soldering should only be performed on FL27E terminals. Never apply heat directly to the battery stainless steel housing.
- Current-Limiting Protection: Fit a series limiting resistor on charging circuit to prevent excessive inrush current after deep discharge.
- Check Polarity Orientation: Confirm positive and negative tabs are correctly placed on PCB pads to avoid reverse charging damage.
- Thermal & Mechanical Limits: Do not heat above 85°C. Never burn, crush, puncture or disassemble the battery.
Typical Applications
- Real-Time Clock (RTC) and SRAM memory retention in smart energy meters and industrial gateways
- Automotive telematics, dashcams, eCall emergency systems, and GPS tracking modules
- Smart home IoT sensors, security keypads, and Bluetooth beacon transmitters
- Handheld medical diagnostics, wearable monitors, and portable testing equipment
- Point-of-Sale (POS) terminals, electronic shelf labels, and digital appliances
Order & Shipping Info
| Minimum Order Quantity (MOQ) | 1 Piece |
|---|---|
| Shipping Time | Shipped within 1-2 business days |
| Delivery Time | 3-7 working days worldwide |
| Shipping Methods | DHL, UPS, FedEx, EMS, YFH Standard |
| Payment Methods | T/T (Bank Transfer), PayPal, Credit Card, Western Union |
Technical Support
For datasheet, sample requests, stock check, bulk pricing and custom versions with solder tabs, pins and wire assemblies, please use the Quick Inquiry form. We will reply within 24 hours.
Frequently Asked Questions
Q1: What does “FL27E” stand for in MS920T-FL27E?
A: “FL27E” designates the factory pre-welded terminal tab configuration, covering shape, direction and pin spacing, designed for SMD or through-hole PCB assembly.
Q2: What advantages does Seiko MS manganese silicon chemistry have?
A: It features stable discharge voltage, low internal resistance, strong overcharge tolerance and higher available capacity compared with conventional rechargeable lithium coin cells.
Q3: Can MS920T-FL27E work with standard 3.3V power circuits?
A: Yes. It is rated for 3.0V nominal operation. It can be continuously trickle charged from a regulated 3.1V~3.2V power rail with simple resistor and diode protection circuit.
Q4: Can I request other tab styles or custom wire leads?
A: Yes. Apart from FL27E tabs, custom solder pins, lead wires and connector assemblies can be supplied upon request via inquiry form.
Q5: Are there alternative or compatible replacement models for MS920T-FL27E?
A: The base model MS920T (without tabs) shares identical electrical parameters, but requires separate welding if you need PCB mounting. There is no fully pin-to-pin drop-in competitor; always verify charging circuit design before switching brands.
Q6: What is the main difference between rechargeable MS series and common CR2032 primary coin cells?
A: MS920T is rechargeable for RTC backup cycling. CR series are disposable primary batteries and cannot be recharged. Do not replace each other directly without redesigning charging circuits.
Q7: How long can the MS920T-FL27E maintain charge during storage?
A: Thanks to ultra-low self-discharge design, it retains most capacity over years when stored at -30℃ ~ +45℃ environment, suitable for equipment long-term shelf storage.
Q8: What risks will happen if charging voltage exceeds 3.4V?
A: Excessive voltage will accelerate capacity decay, cause internal electrolyte decomposition, and may lead to swelling or permanent battery failure. Strictly limit charging voltage within 2.8V~3.3V.
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