Bulk Wholesale 9V USB C Rechargeable Lithium Ion Battery for Smoke Alarms |

• Low degradation and high returns: Break free from the inefficient "buy-and-discard" model typical of traditional dry-cell batteries. With a cycle life of over 1,000 cycles, this 9V square battery ensures that—under normal usage conditions—there will be no need to purchase replacement batteries for several years.
• Save Up to 80% on Waiting Time: Powered by a built-in, high-efficiency charge management chip, this product supports both an ultra-fast 1.5-hour (90-minute) charging mode and a standard, steady 120-minute charging mode. For equivalent battery capacities, charging efficiency is boosted several-fold compared to traditional batteries, providing superior energy responsiveness for high-usage industrial and consumer electronics applications.
• High-performance stable discharge: Supports a powerful discharge up to 9V/400mA. Even during high-load moments such as when the electronic flash recharges or the four-wheel drive motor starts, it can still provide a stable power flow, ensuring that the equipment is always in optimal performance condition.
• Exceptional Environmental Tolerance: Utilizing a specialized lithium-polymer system, it ensures stable discharge voltage across an environment ranging from -20°C to +60°C—preventing "freezing" at low temperatures and leakage at high temperatures.
• Standard USB-C Charging Protocol: The charging input is perfectly compatible with the globally universal 5V charging standard, allowing it to safely connect to any power source compliant with USB specifications.

Guangzhou Victory Technology Co., Ltd.‌ is an experienced energy technology company rooted in China, specializing in the R&D and manufacturing of high-reliability dry cell batteries, lithium batteries, and energy storage system solutions. Our products are primarily applied across multiple fields including IT, communications, digital devices, and consumer electronics. We are committed to providing long-life, extremely cold and hot resistant, safe and stable energy support for global equipment manufacturers, industrial backup power systems and small and medium-sized renewable energy projects, helping customers solve core challenges in distributed power supply and energy management.

We offer OEM private labeling, custom housing colors, high-capacity battery cell customization, and a comprehensive suite of international certification documentation (including UN38.3, MSDS, CE, RoHS, and others) to ensure your products meet global compliance standards. Our dedicated Key Account Managers provide one-on-one, real-time support, handling feedback and inquiries throughout the entire process—from initial quotation and prototyping to full-scale mass production.

Our popular models include AA, AAA, C, D, 18650, and 9V sizes—available in versions that support direct USB Type-C charging as well as standard non-USB variants. 

Supporting a wide operating temperature range of -20°C to 60°C, this battery maintains chemical stability even in harsh outdoor and industrial environments, ensuring your equipment operates around the clock. It provides uninterrupted power support for cold chain monitoring, field surveying, and high-temperature server room equipment. Before the battery is depleted, the output is locked at a constant 9V, effectively preventing the motor speed from slowing down, the sensor accuracy from drifting, or the wireless signal transmission distance from being shortened due to voltage drop.
We have embedded a smart "brain" into every battery—an integrated intelligent Battery Management System (BMS):
Overcharge/Over-discharge Protection (Automatically cuts off abnormal currents to prevent damage to the battery cells); Short-circuit/Over-current Protection (Even when facing instantaneous high-load outputs, the BMS ensures a millisecond-level response from the circuit system, safeguarding your expensive terminal equipment against damage).

Perfectly compatible with multimeters, wireless microphones, and medical testing equipment—and serving as an essential companion for industrial sensors, professional audio gear, security alarm systems, medical monitors, and smoke detectors—its high energy density ensures reliable performance for long-term monitoring.

Q: Does it suffer from the "memory effect"? Do I need to fully discharge it before recharging?
A: Absolutely not. Lithium battery technology supports "charge-anytime" usage without the need for intentional discharging, which greatly simplifies the maintenance process.

Q: Does the battery lose charge when not in use (self-discharge rate)?
A: Extremely low. The built-in BMS (Battery Management System) ensures very low static power consumption; even after being stored for a year, the battery retains the majority of its charge.

Q: Are 9V lithium batteries suitable for use in audio equipment?
A: Yes, they are suitable. The constant voltage ensures that audio signals remain distortion-free; however, some highly sensitive audio devices may exhibit a faint background noise (generated by the voltage regulation circuitry). We recommend conducting a small-scale test first to verify compatibility.

Q: Can the battery still be used if its casing is damaged?
A: Absolutely not. Damaged casing may cause short circuits or moisture damage. Please recycle immediately in accordance with local e-waste regulations.

Q: Can this battery be used in extremely cold weather?
A: Yes. It supports operation down to -20°C, significantly outperforming alkaline batteries in low-temperature environments.

Contact us today for bulk pricing, sample testing, and custom branding options. Your inquiry is welcome!