The Razer Blade 15 2018 uses one of two batteries depending on the model. The Advanced models (RZ09-0238 series) take the RC30-0248 (also marked 4ICP4/55/162), rated around 80Wh at 15.4V. The Base models (RZ09-0270 series) take the RC30-0270 (also marked 4ICP5/46/108), rated around 65Wh at 15.4V. Because the two share the same overall design but use different packs, you need to confirm whether you have an Advanced or Base unit before ordering. Replacements run $67.99.

Find the full model number printed on the bottom of the case. It will read something like RZ09-0238 for an Advanced unit or RZ09-0270 for a Base unit. Match that number to the battery: RZ09-0238 pairs with the RC30-0248, and RZ09-0270 pairs with the RC30-0270. The two packs differ in capacity (about 80Wh versus 65Wh) and physical size, so the model number is the reliable way to confirm the correct fit before you buy.

A Razer Blade 15 2018 replacement battery costs $67.99. That price applies across the lineup, whether you need the RC30-0248 for an Advanced model (around 80Wh at 15.4V) or the RC30-0270 for a Base model (around 65Wh at 15.4V). Confirm your model number on the bottom of the laptop before ordering so you receive the correct pack the first time, since the Advanced and Base batteries are not the same physical size.

No, Razer Blade 15 2018 batteries are not interchangeable between the Advanced and Base models. The Advanced (RZ09-0238) uses the RC30-0248 at roughly 80Wh and 15.4V, while the Base (RZ09-0270) uses the RC30-0270 at roughly 65Wh and 15.4V. The Base chassis is slightly thicker to fit a SATA drive bay, which leaves room for only the smaller pack. Installing the wrong one will not fit correctly, so always match the battery to your specific model number.

The main difference is capacity and physical size. The Advanced Model battery (RC30-0248, also 4ICP4/55/162) is rated around 80Wh at 15.4V, supporting the higher-end components and vapor chamber cooling. The Base Model battery (RC30-0270, also 4ICP5/46/108) is rated around 65Wh at 15.4V and is made smaller so the chassis can house a 2.5-inch SATA drive alongside the SSD. Both are internal lithium-ion packs, but they are not cross-compatible.

Check two places. First, the laptop model number is printed on the bottom of the case and reads like RZ09-0238 (Advanced) or RZ09-0270 (Base). Second, the battery itself carries its own marking once the bottom panel is removed, such as RC30-0248 or RC30-0270. The Advanced family also includes variants like RC30-024801, and the Base family includes RC30-027001. Matching the laptop model number to the battery code is the quickest way to confirm the right part.

Yes, the Razer Blade 15 2018 battery is user replaceable with basic tools. The pack is internal, so you remove the screws on the bottom panel, lift it off, disconnect the battery cable, unfasten the battery, and install the matching replacement (RC30-0248 for Advanced or RC30-0270 for Base). Work slowly and keep track of the screws, since they can vary in length. Confirm your model number first so the new pack, rated 15.4V, fits the chassis correctly.

Common signs include much shorter runtime than the original 80Wh (Advanced) or 65Wh (Base) capacity, the laptop shutting down unexpectedly, or the charge percentage jumping around. You may also notice the battery no longer holding a charge or the trackpad and bottom panel feeling raised, which on these 2018 models is often linked to high internal heat. If you see any of these, replace the pack with the matching RC30-0248 or RC30-0270 for your model.