Battery models & part numbers
| Reference / P/N |
|---|
| Asus-C41N1903-66Wh |
Compatible models
| Model |
|---|
| Asus 0B200-03560100 |
| Asus 0B200-03560300 |
| Asus 0B200-03560400 |
| Asus B3302CEA |
| Asus B3302FEA |
| Asus B5302CBA |
| Asus B9400CBA |
| Asus C41PoJ1 |
| Asus CA436981G |
| Asus ExpertBook B5 B5302CBA |
| Asus ExpertBook B5 Flip B5302FEA |
| Asus ExpertBook B5 Flip B5302FEA-LF0449R |
| Asus ExpertBook B5 Flip B5302FEA-LF0708X |
| Asus ExpertBook B5 Flip B5302FEA-LG0081R |
| Asus ExpertBook B5 Flip B5302FEA-LG0104R |
| Asus ExpertBook B5 Flip B5302FEA-LG0400R |
| Asus ExpertBook B5 Flip B5302FEA-LG0675RA |
| Asus ExpertBook B5 Flip B5302FEA-LG1133XA |
| Asus ExpertBook B5 Flip B5302FEA-LG400R |
| Asus ExpertBook B5 Flip BP5302FEA-LG0081R |
| Asus ExpertBook B9 9400CEA |
| Asus ExpertBook B9 B9400CBA |
| Asus ExpertBook B9 B9400CEA |
| Asus ExpertBook B9 B9400CEA-KC0166R |
| Asus ExpertBook B9 B9400CEA-KC0167R |
| Asus ExpertBook B9 B9400CEA-KC0200R |
| Asus ExpertBook B9 B9400CEA-KC0201R |
| Asus ExpertBook B9 B9400CEA-KC0266R |
| Asus ExpertBook B9 B9400CEA-KC0278R |
| Asus ExpertBook B9 B9450FA |
| Asus ExpertBook B9 B9450FA-BM0165R |
| Asus ExpertBook B9 B9450FA-BM0166R |
| Asus ExpertBook B9 B9450FA-BM0193R |
| Asus ExpertBook B9 B9450FA-BM0525 |
| Asus ExpertBook B9 B9450FA-BM0745R |
Introduction
Keep your Asus ExpertBook running at peak performance with our genuine C41N1903 66Wh replacement battery. Compatible with multiple B5 and B9 series models, this high-capacity battery ensures reliable power for Australian and New Zealand professionals.
Common signs you need a replacement
| Symptom | Cause | Verification | Recommendation |
|---|---|---|---|
| Battery drains quickly | Reduced capacity from age/cycles | Check Windows battery report | Replace if under 50% original capacity |
| Laptop shuts down unexpectedly | Battery can’t maintain voltage | Monitor at 20-30% charge level | Immediate replacement needed |
| Battery won’t charge fully | Charging circuit or cell failure | Check charging percentage over time | Replace battery and check charger |
| Battery swelling/bulging | Internal gas buildup | Visual inspection of battery compartment | Stop using immediately and replace |
| Overheating during use | Inefficient power delivery | Monitor temperature with HWMonitor | Replace to prevent damage to laptop |
How to check compatibility
Finding your exact Asus model number is crucial for battery compatibility. Check the bottom label of your laptop for the exact model code. For ExpertBook B5 and B9 series, the model typically starts with “B5302” or “B9400”. You can also find this information in Windows System Information or by using Asus’s official support tools available on their Australian website.
When to replace
Most laptop batteries last 2-3 years with regular use. Consider replacement when your battery holds less than 60% of its original capacity, shows physical damage, or causes performance issues. For business users in AU/NZ, proactive replacement during off-peak periods can prevent work disruptions.
Installation guide (overview)
Always power off and unplug your laptop before battery replacement. For ExpertBook models, typically remove the bottom panel screws, carefully disconnect the old battery connector, and install the new C41N1903 battery. Refer to Asus’s official service manuals or seek professional installation from authorised service centres in Australia or New Zealand.
Usage & care tips
Optimise your battery life by avoiding extreme temperatures (ideal range 15-25°C), performing regular calibration cycles, and storing at 40-60% charge if not used for extended periods. For AU/NZ climates, avoid leaving laptops in hot cars or direct sunlight.
Safety & recycling in AU/NZ
Lithium-ion batteries must be disposed of properly. In Australia, use Batteryback or council e-waste services. In New Zealand, utilise accredited e-waste recyclers. Never dispose of batteries in household rubbish due to fire risk and environmental concerns.
FAQ
How long does delivery take in Australia?
Most capital cities receive orders within 2-3 business days, regional areas may take 3-5 days.
Is this battery genuine Asus?
Yes, this is an original Asus C41N1903 battery with full manufacturer warranty.
Will this work with my ExpertBook B5 Flip?
Yes, compatible with all B5302FEA Flip models listed in our compatibility table.
How do I calibrate the new battery?
Charge to 100%, use until 5%, then recharge fully. Repeat monthly for optimal performance.
What’s the warranty period?
12 months manufacturer warranty applies across Australia and New Zealand.
Can I install this myself?
Yes, with basic technical skills. Otherwise, use authorised Asus service centres.
Is fast charging supported?
Yes, compatible with Asus’s fast charging technology for quick power top-ups.