Epowon 5.0Ah Replacement Battery for Milwaukee M18 (2-Pack) vs RYOBI 40V Lithium-Ion 4Ah High Capacity Battery
Head-to-head spec comparison to help you pick the right battery for your needs.
Deciding between a genuine pack and a cheaper aftermarket one? Read our honest genuine vs aftermarket batteries guide.Read the guide →
Spec-by-Spec Comparison
| Spec | Epowon 5.0Ah Replacement Battery for Milwaukee M18 (2-Pack) | RYOBI 40V Lithium-Ion 4Ah High Capacity Battery |
|---|---|---|
| Platform | M18 | 40V |
| Voltage | 18V | 40V MAX |
| Capacity | 5 Ah | 4 Ah |
| Type | high-output | high-output |
| Genuine OEM | No | Yes |
| Fuel Gauge | No | No |
| Warranty | 0 years | 3 years |
| Price | $57.99 | $104.99 |
| Rating | 6.8/10 | 8.4/10 |
| Buy on Amazon | Buy on Amazon |
Pros & Cons
Epowon 5.0Ah Replacement Battery for Milwaukee M18 (2-Pack)
Pros
- Two 5.0Ah packs for close to the price of one genuine Milwaukee M18 battery
- Seller claims compatibility with several Milwaukee M18 battery model numbers
- Higher combined capacity per dollar than a single genuine M18 pack
Cons
- Third-party replacement pack, NOT covered by Milwaukee's tool warranty — any tool damage or safety issue is between you and the third-party seller, not Milwaukee
- Buyer must independently verify voltage and platform fit against their specific M18 tool before use
- A working buying link is not proof of safety, cell quality, or real-world performance — we have not tested this pack
- No manufacturer-backed warranty; seller return policies vary and are not guaranteed
RYOBI 40V Lithium-Ion 4Ah High Capacity Battery
Pros
- Genuine RYOBI 40V pack backed by RYOBI's 3-year warranty
- 4Ah capacity suits RYOBI's outdoor power equipment lineup — mowers, trimmers, blowers
- Fits the full RYOBI 40V platform
Cons
- Listed as low stock at the time of this write-up — availability can be inconsistent
- Mid-range price relative to smaller-capacity 40V packs
- Only compatible with 40V tools, not ONE+ 18V
Our Verdicts
Epowon 5.0Ah Replacement Battery for Milwaukee M18 (2-Pack)
Genuine Milwaukee M18 packs are the safe default; this Epowon 2-pack is a lower-cost aftermarket alternative, but it carries no Milwaukee warranty and buyers must verify fit themselves before trusting it in an M18 tool.
RYOBI 40V Lithium-Ion 4Ah High Capacity Battery
A genuine RYOBI 40V pack for the outdoor-tool side of the lineup — solid capacity for mowers and trimmers, though stock availability has been inconsistent.
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