
About your products,just tell us the relative voltage/ cells/ current A or equipment etc,
We will help to recommend the most suitable products for you.
Product Advantages:
About the battery BMS/PCB/PCM
Function: Detect and protect the battery from over-charge ,over-dicharge, over-current short-circuit ,temperature detecting protection and auotmatically voltage balance function .

| Shenzhen Li-ion Battery Bodyguard Technology Co.,LTD | |||
| PCM Specifications For 7.4V(2S) Li-ion Battery Packs | |||
| Model: LWS-2S12A-021(2S) | |||
| No. | Test item | Criterion | |
| 1 | Voltage | Charging voltage | DC:8.4V CC/CV |
| Balance voltage for single cell | |||
| 2 | Current | Balance current for single cell | |
| Current consumption | ≤20μA | ||
| Maximal continuous charging current | 4A | ||
| Maximum pulse discharge current | 4A | ||
| 3 | Over charge Protection | Over charge detection voltage for single cell | 4.25±0.025V |
| Over charge detection delay time | 0.5S-1.5S | ||
| Over charge release voltage for single cell | 4.05±0.05V | ||
| 4 | Over discharge protection | Over discharge detection voltage for single cell | 2.80±0.08V |
| Over discharge detection delay time | 50mS-150mS | ||
| Over discharge release voltage for single cell | 3.0±0.1V | ||
| 5 | Over current protection | Over current detection voltage | 200±15mv |
| Over current detection current | 11±2A | ||
| Detection delay time | 5ms-15ms | ||
| Release condition | Cut load | ||
| 6 | Short protection | Detection condition | Exterior short circuit |
| Detection delay time | 200-500us | ||
| Release condition | Cut load | ||
| 7 | Resistance | Protection circuitry(MOSFET) | ≤50mΩ |
| 8 | Temperature | Operating Temperature Range | -40~+85ºC |
| Storage Temperature Range | -40~+125ºC | ||









Q: How many Ampere protection circuit boards should choose?
A: It depends on your load power such as electric motor power please contact the sales or technical support before buying.
Q: What is the distinction between same port wiring and different port wiring?
A: The cathode of charger and load is different for different port wiring , the cathode of charger and load is same for same port wiring and the charging current is equal to the discharge current.
Q: What is the distinction between balance and unbalance function?
A: Equilibrium function is that high voltage cells will be discharged with resistor, waiting for the low voltage cells , to achieve the each cell voltage is consistent , to improve the battery performance for the whole group.
Q: Do you have Minimum Order Requirement (MOQ)?
A: No, We don't have MOQ, Different customer have different requirement ,We can provide various capacity and size is per your requirements,Also ODM / OEM is welcome.
Q: What is your term of payment?
A: PayPal, T/T, L/C.
5. Contact usAny further questions, Welcome to contact our sales person by sending inquiry .
Your satisfaction is our pleasure. Let's Join hands for mutual Benefits!