MB-7B-S
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MB-7B-S
Motorcycle · Replaces YT7B-4 · 400 CCA · 4 Ah · 1.5 kg
SERIES
Red series · Jump Start
Built-in reserve cell and push-button emergency start. Drain the main pack and you still get one full crank.
Standard version without reserve cell: MBB-7B-S400CCA
Cold cranking amps
4Ah
Capacity
1.5kg
3.3 lb
12.8V
LiFePO4
01 / 01MOVE TO ROTATEEmergency start
One button. One more crank.
Leave the lights on and the MB-7B-S still gets you home. A sealed reserve cell sits apart from the main pack. Press the button on the case, wait ten seconds, turn the key.
IBMS
Protected on every cycle.
The integrated battery management system monitors voltage, current and cell temperature in real time. It cuts over-charge from a faulty regulator, prevents deep discharge from a parasitic drain, and stops thermal faults before they reach the cells.
Up to 70% lighter
1.5 kg on the scale.
The MB-7B-S weighs 1.5 kg (3.3 lb). MegaLiFe rates its LiFePO4 packs at up to 70% lighter than the lead-acid batteries they replace.
Drop-in fit
Factory tray. Factory hold-down.
Case dimensions are 150 × 65 × 93 mm with right polarity, matching the YT7B-4 footprint. No relocation kit, no adapter plates.
- Model
- MB-7B-S
- SKU
- ML-MB-7B-S
- Chemistry
- LiFePO4 (lithium iron phosphate)
- Rated voltage
- 12.8 V
- Main capacity
- 4 Ah
- Reserve capacity
- To be confirmed
- Cold cranking amps
- 400 CCA
- Rated discharge current
- To be confirmed
- Instantaneous discharge current
- To be confirmed
- Internal resistance
- To be confirmed
- Charge / discharge cycles
- To be confirmed
- Self discharge rate
- To be confirmed
- Operating temperature
- To be confirmed
- Low voltage protection
- To be confirmed
- High voltage protection
- To be confirmed
- Short circuit protection
- To be confirmed
- Dimensions (L × W × H)
- 150 × 65 × 93 mm
- Weight
- 1.5 kg / 3.3 lb
- Polarity
- Right (+/–)
- Replaces
- YT7B-4
- Emergency start button
- To be confirmed
- Recommended charger
- ML-BC14-2A
- Warranty
- 3 years from manufacture date
- Certifications
- RoHS · CE · FCC · MSDS · DMSB
Compatibility
Fits YT7B-4.
Direct replacement for YT7B-4 lead-acid and AGM batteries. Check the model printed on your current battery; if it reads YT7B-4, the MB-7B-S drops in.
Recommended charger
ML-BC14-2A
2A lithium charger, 14.6V output
Not sure? Send us your vehicle and we will confirm the fit.
More motorcycle
Nearby sizes.
Questions
Before you buy.
Is a lithium starting battery safe in my car?
Yes. MegaLiFe uses LiFePO4 (lithium iron phosphate), the most thermally stable lithium chemistry. Each pack is sealed, shock- and waterproof, and protected by an integrated battery management system that guards against over-charge, over-discharge and overheating.
Do I need a special charger?
Your vehicle's alternator charges a MegaLiFe normally. For bench charging use a lithium-compatible charger. We recommend our ML-BC14 series, sized 2A for motorcycles, 6A for small packs and 10A for vehicle batteries.
What happens if I leave the lights on?
Press the emergency start button on the case. A sealed reserve cell provides one full crank so you can drive home and recharge. It is a feature every MegaLiFe carries as standard.
Will it fit my vehicle without modification?
MegaLiFe cases are built to BCI group and JIS dimensions, so they drop into the factory tray with the factory hold-down. Check the group size on your current battery and match it on the product page.