RHC1550 Hybrid Layer Capacitor
RHC1550 is designed as a pulse power buffer for long-life ER primary lithium battery systems. The capacitor is charged slowly by the Li-SOCl2 cell during standby, then releases current quickly during communication, positioning, valve actuation or other short peak loads.
| Model | RHC1550 |
|---|---|
| Type | Hybrid Layer Capacitor, Hybrid Layer Capacitor (HLC), hybrid pulse capacitor, Hybrid Super Capacitor, Pulse Capacitor for Li-SOCl2 Battery, HPC capacitor |
| Nominal Voltage | 3.7V |
| Capacity | 650As, about 180mAh |
| Dimensions | Diameter 15mm x 50.5mm |
| Weight | About 22g |
| Maximum Continuous Current | 1500mA |
| Maximum Pulse Current | 5000mA |
| Operating Temperature | -40℃ to +85℃ |
| Common Pairings | ER14505 + RHC1550, ER34615 + RHC1550, 2ER34615 + RHC1550, custom ER battery pack with RHC |
Custom ER battery pack with RHC1550 capacitor for smart meters, GPS trackers, IoT sensors, AMR/AMI and remote telemetry devices
VTCBATT can support cell selection, capacitor pairing and pack-level customization for engineering projects.
Why add RHC1550 to a Li-SOCl2 ER battery?
ER cells are strong for long-term low current. RHC1550 handles the short high-current events that can cause voltage drop, reset or communication failure.
- High pulse support: Supports GSM, 4G, LoRa, NB-IoT, GPS startup and valve drive pulse loads up to the specified 5000mA maximum pulse current.
- Lower passivation impact: RHC supplies the initial pulse while the ER cell recovers more gradually, reducing the demand for the cell to break through LiCl passivation instantly.
- Long-life system design: The ER battery remains the main energy source for years of standby operation, while RHC1550 acts as the short-duration power source.
- Wide temperature operation: The -40C to +85C working range supports outdoor meters, remote telemetry, industrial monitoring and oil and gas sensors.
ER battery + capacitor solution
RHC1550 works between the Li-SOCl2 cell and the pulse load
In a long life IoT battery solution, the Li-SOCl2 ER battery is the energy source. It supports low-power standby and slowly recharges the capacitor. RHC1550 is the pulse power buffer that supplies high peak current when the device wakes up for transmission, GPS positioning or actuator movement.
This architecture helps solve a common engineering problem: the device must run for 8 to 10 years, but wireless communication or a valve motor needs hundreds of milliamps to several amps for a short time.
How RHC1550 behaves during standby, wake-up and recharge
This is the practical operating logic for smart meters, GPS trackers and remote sensors that sleep most of the time and transmit briefly.
- Standby: ER battery keeps the system alive
The ER cell supplies microamp-level sleep current to the MCU and keeps RHC1550 charged. In many meter and sensor designs, this is the dominant operating state. - Before transmission: MCU checks capacitor readiness
When the device wakes, the control circuit can check capacitor voltage before enabling high-current loads such as NB-IoT, LTE-M, GPRS, LoRa or GPS. - Pulse event: RHC1550 releases high current
During a short pulse, RHC1550 supplies current to the communication module, positioning module or valve actuator. This avoids forcing the ER cell into sudden high-rate discharge. - After the pulse: ER battery slowly recharges RHC
Once transmission or actuation is finished, capacitor voltage drops slightly and then recovers as the ER battery recharges it at a low current.
Safety and reliability
Safety advantages of the ER + RHC1550 power structure
RHC1550 does not turn an ER primary cell into a rechargeable battery. It is used as a controlled pulse energy buffer in the system.
No rechargeable cell cycle inside the ER cell
Li-SOCl2 is a primary chemistry. The ER cell remains the long-life energy source for low-current standby and gradual capacitor recharge.
Reduces incorrect charging risk
The capacitor handles limited charge and discharge buffering, while pack design should prevent users from treating the ER battery as a rechargeable pack.
Outdoor and industrial fit
The RHC1550 -40C to +85C range, combined with suitable ER cells, supports outdoor meters, oil and gas monitoring and remote telemetry devices.
Full Certification & Extended Warranty
VTCBATT Li-SOCl2 batteries meet global certifications including CB, CE, UL, and UN38.3, and offer a 14-month warranty—two months longer than standard—to maximize customer confidence and profit.
VTCBATT Li-SOCl2 battery with RHC1550 passed all the major global certifications, such as CB, CE, EN61000,IEC62133,MSDS.UN38.3,ROHS,UL,BIS,KC Certification,which makes your product more competitive.
Compared to a normal 12-month warranty, VTCBATT Li-SOCl2 batteries with RHC1550 have 14-month warranty and two extra months for shipping and customs clearance ,which ensure the customer’s profit.
VTCBATT Production and Service
To meet the diverse demands of different customers,VTCBATT is noly only devoted to precise and standardized manufacturing in every process to ensure the highest-quality batteries, but also focuses on customized design and excellent service. By providing comprehensive support from pre-sales to after-sale ,VTCBATT cares customers’ feedback to establish long-term and win-win cooperation. Fast assistance and professional battery proposals are the core principle of our professional sales and technical engineers team.
From the raw materials mixing to the cell test, VTCBATT adopts an automatic manufacturing process to maximize production efficiency and enhance the batteries
quality, safety, and reliability. The entire manufacturing process is monitored and 100% tested before flowing to the next procedure to ensure zero defects before delivery.
Over the past 20 years, VTCBATT has built strong partnerships with customers in more than 50 countries worldwide. With reliable quality, responsive service, and tailored battery solutions, we have earned the trust of our clients—many of whom have maintained long-term cooperation and lasting friendships with us for over a decade. Together, we continue to grow and move forward toward a brighter future.
RHC1550 application range for smart meters and IoT devices
Buffers GPS, LTE-M, NB-IoT or GPRS current spikes for logistics and container tracking.
Supports long standby GPS tracker battery design for logistics and shipment monitoring.
Helps remote LoRa and industrial wireless sensors transmit reliably after long standby.
Provides pulse current for wireless transmission and control modules in gas metering systems.
Supports AMR/AMI uploads and valve movement in long-life water meter battery packs.
RHC1550 is a Hybrid Layer Capacitor. In an ER battery system it is not the main energy source; it is used as a pulse power buffer between the Li-SOCl2 cell and the load.
Li-SOCl2 ER batteries are suitable for long-term low-current operation, but high pulse current can cause voltage drop, communication failure or MCU reset. RHC1550 supplies the short pulse and lets the ER cell recharge it slowly.
It can reduce the impact during startup. Long-stored ER cells may form a LiCl passivation layer. When RHC1550 supplies the initial pulse, the ER cell does not need to deliver the full high current instantly.
Common applications include smart water meters, gas meters, AMR/AMI terminals, GPS trackers, IoT sensors, LoRa sensors, pipeline monitoring, oil and gas sensors and remote telemetry systems.
Please provide pulse current, pulse duration, standby current, transmission frequency, target lifetime, operating temperature, connector type, space limit and annual quantity.
ER passivation support
How RHC1550 helps with ER battery passivation
Li-SOCl2 ER cells form a lithium chloride layer on the lithium anode during storage. This passivation layer is useful because it helps lower self-discharge, but it can also increase initial resistance when a device suddenly demands high current.
Without a pulse buffer, a long-stored ER cell may be asked to deliver a 500mA to 2A startup pulse directly. That can create voltage sag, longer activation time, communication failure or MCU reset. With RHC1550, the capacitor supplies the first pulse while the ER cell recovers and recharges the capacitor more gradually.
| ER storage effect | LiCl passivation layer helps reduce self-discharge. |
|---|---|
| Direct high-current risk | Voltage drop, slow activation, communication failure or reset. |
| RHC1550 role | Supplies the initial pulse and reduces instant stress on the ER cell. |
| System result | Better cold start behavior and more stable wireless communication. |
Technical comparison
ER single-cell supply vs ER + RHC1550 design
For smart meter and IoT terminals, the RHC hybrid capacitor improves pulse stability without changing the role of the primary ER battery.
| Item | ER Battery Only | ER + RHC1550 |
|---|---|---|
| Service life | 10+ years in suitable low-current designs | 10+ years in suitable low-current designs |
| Pulse capability | Usually limited to tens or hundreds of mA, often below 200-300mA for demanding pulses | Can support 2A to 5A+ pulse events when properly designed |
| GPS / 4G support | Difficult under heavy pulse load | Practical with correct capacitor and pack design |
| Voltage delay / passivation | High load after idle storage may cause voltage sag | RHC directly discharges for the pulse and reduces voltage delay impact |
| Low-temperature startup | Moderate | Improved pulse stability |
| System stability | Medium under RF burst loads | High for smart meters, ETC tags, GPS trackers and industrial sensors |
| Model | RHC1530 | RHC1550 |
|---|---|---|
| Size | Diameter 15mm x 30mm | Diameter 15mm x 50.5mm |
| Stored energy | Smaller | Larger |
| Typical use | Small IoT and metering devices | Higher pulse demand devices |
| Series | Hybrid Layer Capacitor series | Hybrid Layer Capacitor series |
| Item | Common Supercapacitor | RHC1550 |
|---|---|---|
| Voltage | About 2.7V | 3.7V |
| Energy density | Lower | Higher |
| Leakage | More obvious | Lower |
| Typical application | General storage and peak compensation | IoT long-life power plus pulse current |
| Li-SOCl2 matching | Not usually dedicated | Designed for ER battery pulse systems |
Engineering inquiry
Send your device pulse profile for ER + RHC1550 battery pack design
For accurate selection, share the device type, pulse current, standby current, transmission frequency, target lifetime, connector requirement, operating temperature and annual quantity.
Recommended inquiry fields
- Device type and operating temperature
- Pulse current and pulse duration
- Standby current and upload frequency
- Target service life and space limit
- Connector, wire and annual quantity
