Tewaycell TW1208
Tewaycell 12.8V 8Ah LiFePO4 Deep Cycle Battery User Manual
모델: TW1208
1. 제품 오버view
The Tewaycell 12.8V 8Ah Lithium Iron Phosphate (LiFePO4) Deep Cycle Battery is a high-performance, rechargeable power solution designed for various applications, including power tools, backup power systems, and as a superior replacement for traditional Sealed Lead Acid (SLA) batteries. Featuring a built-in Battery Management System (BMS), this battery offers enhanced safety, longevity, and efficiency.

Figure 1: Tewaycell 12.8V 8Ah LiFePO4 Deep Cycle Battery. This image shows the compact black battery unit with orange and white labeling indicating its brand, voltage, 용량.
2. 안전 정보
Please read and understand all safety instructions before using the Tewaycell LiFePO4 battery. Failure to follow these instructions may result in electric shock, fire, serious injury, or property damage.
- 배터리 단자를 단락시키지 마십시오. 이로 인해 배터리가 심각하게 손상될 수 있으며 화재 위험이 발생할 수 있습니다.
- 호환되는 충전기만 사용하십시오. Charging with an incompatible charger may damage the battery or lead to overheating.
- 배터리를 분해, 뚫거나 개조하지 마세요. The internal components are not user-serviceable.
- 배터리를 물, 불, 극한 온도로부터 멀리하세요. Optimal operating temperature is specified in the specifications section.
- 적절한 환기를 확보하세요 when charging or discharging the battery, especially in enclosed spaces.
- 조심해서 다루세요. 배터리를 떨어뜨리거나 강한 충격을 가하지 마십시오.
- 배터리를 책임감 있게 폐기하십시오. according to local regulations. Do not dispose of in household waste.
3. 제품 특징
The Tewaycell LiFePO4 battery incorporates advanced technology to deliver superior performance and reliability:
- 컴팩트하고 가벼운 디자인: Approximately 70% lighter than comparable lead-acid batteries, making it ideal for applications where weight reduction is crucial, such as kayaks, boats, RVs, and power wheelchairs.
- Perfect SLA Replacement: Designed to be a direct replacement for 12V Sealed Lead Acid (SLA) batteries. Four 3.2V cells are configured in series to achieve a nominal voltage of 12.8V, closely matching the voltage requirements for many SLA applications.
- 연장된 사이클 수명: Offers a significantly longer lifespan with at least 2000 cycles at 100% Depth of Discharge (DOD), and retains 80% capacity even after 3000 cycles. This is up to 10 times longer than typical lead-acid batteries.
- 내장형 배터리 관리 시스템(BMS): The integrated BMS actively monitors and manages the battery's real-time status. It provides essential protections including:
- 낮은 볼륨과 높은 볼륨tage 컷오프 보호
- 과충전 방지
- 과방 전 보호
- 과전류 보호
- 단락 보호
- Cell Balancing for optimal performance and longevity
- 낮은 자가방전율: Maintains charge for longer periods when not in use.
- 10-Year Lifetime: Engineered for long-term durability and performance.

Figure 2: Comparison of Tewaycell LiFePO4 battery with a traditional Lead Acid Battery. This graphic highlights the superior lifetime (10 years vs 3 years), cycle life (2000-4000 vs 300-500), load power (2 times vs 1 time), weight (2.09lb/0.95kg vs 3 times LiFePO4 weight), and Depth of Discharge (90% DOD vs 50% DOD) of the LiFePO4 battery.

Figure 3: Diagram illustrating the various protections provided by the Built-in Battery Management System (BMS), including over-discharge, over-charge, short circuit, over-current, and cell balance.
4. 사양
| 기인하다 | 세부 사항 |
|---|---|
| 상표 | 티웨이셀 |
| 모델 | 티와이1208 |
| 부품 번호 | Tewaycell12.8-8 |
| 공칭 권tage | 12.8 볼트 |
| 배터리 용량 | 8 Amp 시간 (아) |
| 배터리 셀 구성 | 리튬철인산(LiFePO4) |
| 제품 크기(L x W x H) | 15.1 x 6.5 x 10cm(5.94 x 2.56 x 3.94인치) |
| 무게 | 1.21kg(2.67파운드) |
| 호환 장치 | Monitors, Solar Systems, Power Tools, Wheelchairs |
| 장착 하드웨어 | Screw Kit (included) |
| 일생 | 10년 |
| 사이클 수명 | 100% DOD에서 2000회 이상 사이클 |

Figure 4: Detailed dimensions of the Tewaycell 12.8V 8Ah LiFePO4 battery, showing length (151mm / 5.94"), width (65mm / 2.56"), and height (100mm / 3.94"), along with F2 terminal details.
5. 설정 및 연결
Before connecting the battery, ensure all devices are turned off and that you are working in a dry, well-ventilated area.
5.1 초기 검사
Upon receiving your battery, inspect it for any visible damage. If any damage is found, do not attempt to use the battery and contact customer support immediately.
5.2 배터리 연결하기
The Tewaycell LiFePO4 battery can be used individually or connected in series or parallel for higher voltage or capacity requirements. Always ensure correct polarity when making connections.
- 단일 배터리 연결: Connect the positive (+) terminal of the battery to the positive input of your device and the negative (-) terminal to the negative input.
- 직렬 연결 (더 높은 볼륨용)tag이자형): 볼륨을 높이려면tage, connect the negative terminal of one battery to the positive terminal of the next. The maximum recommended series connection is up to 48V (e.g., four 12.8V batteries for 51.2V nominal). Ensure all batteries in a series string have the same capacity and are fully charged before connecting.
- 병렬 연결(더 높은 용량의 경우): To increase capacity, connect positive terminals together and negative terminals together. It is recommended to connect less than 10 batteries in parallel. Ensure all batteries in a parallel bank have the same voltage and are fully charged before connecting.
Use appropriate gauge wiring and connectors for your application to prevent overheating and ensure efficient power transfer. The included screw kit can be used for secure terminal connections.

Figure 5: Illustration of battery connection methods. The diagram shows how to connect multiple batteries in series (up to Max. 48V) and in parallel (Less Than 10 Batteries in Parallel Recommended) to achieve desired voltage 또는 용량.
6. 배터리 작동
6.1 배터리 충전
The Tewaycell LiFePO4 battery can be recharged using a dedicated Lithium Battery Charger or a compatible Solar Panel.
- Lithium Battery Charger:
- 권장 충전량tag전자: 14.2V ~ 14.6V
- Recommended Charging Current: 2A (for 8Ah model)
- 극성이 올바른지 확인하면서 충전기를 배터리 단자에 연결하십시오.
- 태양광 패널:
- Recommended Solar Panel Power: 30W
- Charging Mode: 14.6V LiFePO4 (ensure your solar charge controller is set for LiFePO4 batteries)
- Connect the solar panel via a compatible solar charge controller to the battery.
The built-in BMS will protect the battery from overcharging, but using a charger specifically designed for LiFePO4 batteries with the correct voltage and current settings is crucial for optimal battery health and longevity.

Figure 6: Two primary methods for recharging the Tewaycell LiFePO4 battery: using a dedicated Lithium Battery Charger or a Solar Panel with an appropriate charge controller.
6.2 배터리 방전
The battery is designed for deep cycle applications, allowing for a high Depth of Discharge (DOD) of up to 90%. The BMS will automatically cut off power if the voltage drops too low to prevent over-discharge, protecting the battery.
6.3 일반적인 애플리케이션
This battery is versatile and suitable for a wide range of applications:
- 전동 공구
- 백업 전원 시스템
- 태양열 에너지 저장
- 전기 스쿠터
- Marine Applications (Boats, Fishing)
- RV와 Camp잉 파워
- 전동 휠체어
- Monitors and other electronic devices requiring 12V power

그림 7: 예amples of common applications for the Tewaycell LiFePO4 battery, including radio stations, e-scooters, boat/fishing, and RV/camp주고받음.
7. 유지관리
Proper maintenance will ensure the longevity and optimal performance of your Tewaycell LiFePO4 battery.
- 정기 청소: 배터리 단자를 깨끗하게 유지하고 부식이 생기지 않도록 하십시오. 마른 천으로 배터리 단자를 닦아주세요.asing.
- 저장: If storing the battery for an extended period, ensure it is charged to approximately 50-70% of its capacity. Store in a cool, dry place away from direct sunlight and extreme temperatures. Recharge every 3-6 months if stored for very long durations.
- Avoid Deep Discharge for Long Periods: While the BMS protects against over-discharge, it's best practice to recharge the battery promptly after it has been deeply discharged.
- 연결 확인: Periodically check that all connections are secure and free from looseness or damage.
8. 문제 해결
If you encounter issues with your Tewaycell LiFePO4 battery, refer to the following common troubleshooting steps:
| 문제 | 가능한 원인 | 해결책 |
|---|---|---|
| 배터리가 충전되지 않음 | Incorrect charger; loose connections; charger malfunction; BMS protection activated. | Ensure you are using a LiFePO4 compatible charger with correct voltage/current. Check all cable connections. Test charger with another device if possible. If BMS has activated protection (e.g., due to deep discharge), a specific LiFePO4 charger may be needed to reactivate it. |
| 배터리가 전원을 공급하지 않습니다 | Battery is discharged; BMS protection activated (over-discharge, over-current, short circuit); loose connections. | Charge the battery. Check for any short circuits in your system. Ensure all connections are secure. If the BMS has tripped, remove the load and try to reset by connecting to a charger. |
| 런타임 단축 | Battery not fully charged; aging battery; high power draw from device. | Ensure battery is fully charged before use. Verify charging parameters. Consider the power consumption of your device. While the battery has a long life, all batteries eventually degrade. |
| Battery feels warm during operation/charging | Normal operation (slight warmth); excessive load; poor ventilation; internal issue. | Slight warmth is normal. Ensure adequate ventilation around the battery. Reduce load if possible. If the battery becomes excessively hot or emits an odor, immediately disconnect it and contact support. |
If the problem persists after attempting these solutions, please contact Tewaycell customer support for further assistance.
9. 보증 및 지원
Tewaycell is committed to providing high-quality products and responsive customer service. We stand behind our products with confidence.
- 보증: Specific warranty details are typically provided with your purchase documentation. Please refer to the warranty card or product packaging for the exact terms and duration of your warranty.
- 고객 지원: For any questions, technical assistance, or warranty claims, please contact Tewaycell customer service. We aim to be responsive as quickly as within 18 hours via email.
- 연락처 정보: Please refer to the contact details provided on the Tewaycell official web사이트 또는 구매 송장.
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