Batteries for MBK Thunder Thunder 125 12 hp
Which battery does a MBK Thunder Thunder 125 need?
Specifications and battery: Thunder 125 (12 hp)
MBK Thunder Thunder 125 (12 hp) takes a conventional 7 Ah, 74 A battery (136 × 76 × 134 mm), with the positive terminal on the right.
Battery for this engine
| Version | Technology | Capacity | Cold cranking (EN) | Size (L×W×H) | Polarity |
|---|---|---|---|---|---|
| Main | Conventional | 7 Ah | 74 A | 136 × 76 × 134 mm | + on the right |
The same batteries also fit the Thunder 150 (13 hp) engine of this model.
Data: vehicle specifications and the battery manufacturer's application catalogue.
EFB, AGM or conventional for this engine?
Rule of thumb for the MBK Thunder Thunder 125: fit the same technology as the original or better (conventional → EFB → AGM), with equal or higher capacity and cold cranking amps, and respect the size and terminal position of around 7 Ah.
Battery analysis for your MBK Thunder Thunder 125
Quick answer You need an ordinary lead-acid battery of 7 Ah. Our recommendation: VARTA 12N7-3B.
Prices and availability updated on 29/10/2026
Based on the batteries we found for your vehicle, our experts help you pick the right one.
📋 What we found
For your MBK Thunder Thunder 125 we found 3 compatible conventional batteries.
📏 Battery size
The list contains batteries in different sizes or capacities (Ah). In many cases both variants fit, but it's worth checking your compartment dimensions and the Ah of your original battery before buying. Choose the one with the same dimensions as your current battery: a bigger one may not fit the compartment or the hold-down. If several match your size, the higher capacity gives more headroom for cold starts.
📊 View AGM vs EFB vs Conventional — full comparison
⭐ Our recommendation
For your MBK Thunder Thunder 125 we recommend the VARTA 12N7-3B (ordinary lead-acid, 7 Ah). Varta is the world's leading manufacturer of starter batteries and supplies first-equipment (OEM) batteries to the major European car makers.
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Verified selection
- Class: Motorcycle Batteries
- Brand: MBK
- Model: Thunder
- Engine: Thunder 125
Conventional batteries
Standard lead-acid batteries.
-
Motorcycle battery Varta 12N7-3B (507012004) 12V 7Ah 74A
- 12 V
- 7 Ah
- 74 A
Dimensions 136×76×134 mm
- ✓ Varta brand
€110.70
-
Motorcycle battery Exide EB7L-B 12V 8Ah 85A
- 12 V
- 8 Ah
- 85 A
- Conventional EXIDE EB7L-B · 8 Ah · 85 A
Dimensions 135×75×135 mm
€45.20
-
Motorcycle battery Fulbat FB7L-B/B2 GEL 12V 8.4Ah 100A GEL
- 12 V
- 8.40 Ah
- 100 A
- GEL FULBAT FB7L-B/B2 GEL · 8.40 Ah · 100 A
Dimensions 136×76×130 mm
€53.22
| Category | Make | Reference | Capacity | Cold cranking | Dimensions | Technology | Price | |
|---|---|---|---|---|---|---|---|---|
| Conventional batteries | VARTA | 507012007 | 7 Ah | 74 A | 136×76×134 mm | Conventional | €110.70 | More info |
| Conventional batteries | EXIDE | EB7L-B | 8 Ah | 85 A | 135×75×135 mm | Conventional | €45.20 | More info |
| Conventional batteries | FULBAT | FB7L-B/B2 GEL | 8.40 Ah | 100 A | 136×76×130 mm | GEL | €53.22 | More info |
Frequently asked questions
- MBK Thunder Thunder 125 (12 hp) takes a conventional 7 Ah, 74 A battery (136 × 76 × 134 mm), with the positive terminal on the right. We found 3 compatible batteries priced between 45,20€ — 110,70€. Check dimensions and positive terminal position before purchasing.
- Yes, you can install a higher capacity (Ah) battery as long as the physical dimensions fit your MBK Thunder Thunder 125 battery compartment and the positive terminal position matches.
- Motorcycles can use GEL, AGM, or conventional batteries. GEL batteries are ideal for occasional use. AGM batteries are the best option for heavy use or high-power motorcycles. Always check the polarity before installation.
- Polarity indicates which side has the positive (+) terminal. This is critical for motorcycles because some models have the positive terminal on the left and others on the right. Check the label on your current battery or the manufacturer's manual.
- Yes. First disconnect the negative (−) wire and then the positive (+) wire. When installing the new one, connect the positive (+) wire first and then the negative (−) wire. Always respect the correct polarity.
- Use the search tool by selecting your vehicle's make and model. Our system automatically filters compatible part numbers verified by our technicians. If you have any questions, contact us via WhatsApp.
- All our batteries come with the legal guarantee provided by consumer law against manufacturing defects. If a battery has a manufacturing defect, it will be replaced at no cost to the user.
- Under normal circumstances, batteries usually arrive within 1 to 2 days of ordering. However, there are some cases where delivery may take a little longer: peak seasons (Black Friday, Christmas, etc.), palletized shipments, occasional stock shortages, etc.