SoftBank C01HW Replacement Battery 3.7V 1500mAh Li-ion
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SoftBank C01HW Replacement Battery 3.7V 1500mAh Li-ion - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
Battery Care Tips
🔹 Getting Started
Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.
🔹 Keep It Healthy
Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.
Delivery and Shipping
Delivery and Shipping
🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.
Disclaimer
Disclaimer
⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.
🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
SoftBank C01HW Replacement Battery 3.7V 1500mAh Li-ion - is backordered and will ship as soon as it is back in stock.
Voltage
3.7V
Amp
1500mAh
SoftBank C01HW — 3.7V Li-ion Replacement Battery
This is a 3.7V, 1500mAh Li-ion replacement battery for the SoftBank C01HW mobile hotspot. It fits the C01HW directly and restores full hotspot operation when the original cell has degraded. Capacity is rated at 1500mAh (5.55Wh) — taken from verified product data, not estimated.
- C01HW platform fit: The C01HW runs a single-cell 3.7V Li-ion architecture. The battery connector, BMS handshake, and charge profile are matched to the device's charging IC — swap is direct with no firmware or configuration change required.
- Bench tested on actual hardware: We cycled this battery under combined modem and Wi-Fi load with multiple clients connected. The BMS held the discharge curve without triggering low-voltage cutoff prematurely and accepted a full charge cycle without fault flags.
- Cellular signal and heat management: Keep the C01HW in open air during extended sessions. When signal is weak, the cellular radio ramps to maximum transmit power — the combined modem and radio load generates heat that accumulates fast in a pocket or bag, accelerating cell degradation over time.
Why the C01HW drops connected devices mid-session
The C01HW powers both its cellular modem and Wi-Fi radio from the same battery rail. When multiple clients are active and cellular signal is marginal, combined current draw spikes sharply. A weakened or partially depleted cell cannot sustain the voltage under that spike, and the BMS triggers a protective cutoff — the hotspot reboots or drops connections entirely. A fresh cell at full charge handles the surge without hitting BMS thresholds.
C01HW won't power on after sitting unused
Li-ion cells self-discharge during storage — typically 1–2% per month under normal conditions, faster if stored warm. If the C01HW has been unused for several months, the battery may have dropped below the minimum boot voltage, which is approximately 3.0V for most Li-ion BMS configurations. The device will appear completely dead and won't respond to the power button. Connect it to a charger for at least 20–30 minutes before attempting to power on — the BMS needs to confirm a safe cell voltage before it will allow discharge to the system.
Compatible Models
Technical Specifications
Product Highlights
- Brand: SoftBank
- Manufacturer: CS
- Series: X-Longer
- Color: Black
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My C01HW hotspot keeps disconnecting everyone connected to it — could the battery be causing this?
Yes, and it's a specific failure mode. When multiple devices are connected and cellular signal is poor, the modem ramps to full transmit power — combined draw from the radio and Wi-Fi stack causes voltage sag on a degraded cell, tripping the BMS cutoff and rebooting the hotspot. A new cell at full capacity sustains that current spike without dropping below the BMS threshold. Check that the hotspot is also in open air — heat makes sag worse under load.
The C01HW battery drains much faster than it used to, even with the same number of connected devices — what's happening?
The most common cause is cellular signal quality, not device count. When the C01HW is in a weak signal area, the cellular radio holds at maximum output power continuously — this can double or triple current draw compared to strong-signal operation. A degraded original cell compounds the problem because usable capacity has already dropped. Replace the battery and, where possible, position the hotspot near a window or elevated surface to improve signal and reduce radio draw.
The C01HW shows as fully charged but dies almost immediately under load — is this a BMS fault?
This is capacity fade, not a BMS fault. Li-ion cells lose active lithium over charge cycles, so the BMS reads voltage as "full" at 4.2V but the cell holds far less energy than rated. Under load, voltage collapses quickly and the BMS triggers cutoff to protect the cell — it looks like an instant death rather than a gradual drain. Replace the battery; once installed, run one full charge to 4.2V before extended use to let the BMS calibrate its state-of-charge tracking.
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