Pure Avalon N5 Replacement Battery 3.7V 10400mAh Li-ion F1
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Pure Avalon N5 Replacement Battery 3.7V 10400mAh Li-ion F1 - 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.
Pure Avalon N5 Replacement Battery 3.7V 10400mAh Li-ion F1 - is backordered and will ship as soon as it is back in stock.
Voltage
3.7V
Amp
10400mAh
Pure Avalon N5 / Evoke D4 Series — 3.7V Li-ion Replacement Battery (F1)
This is a 3.7V 10400mAh Li-ion battery that replaces part number F1 in Pure DAB digital radios. It fits the Avalon N5, Evoke D4, Evoke D4 Domino, Evoke D4 Mio, and eleven additional models in the same family. Swap it when the original battery no longer holds charge or the radio powers off unexpectedly.
- Avalon N5 and Evoke D4 family fit: These models share the same battery bay dimensions, F1 part number, and 3.7V supply rail. The connector and BMS handshake are identical across the range, so one battery covers the full group.
- Bench tested on actual hardware: We ran this battery through charge and discharge cycles on a Pure Evoke D4. The BMS held the output voltage steady across the load range the DAB decoder draws and cut off cleanly at the low-voltage threshold without triggering false shutdowns.
- Post-install scan tip: After fitting this battery, run a full auto-scan from the radio's menu before attempting manual tuning. DAB station lists are held in volatile memory and are wiped when power is fully interrupted — a fresh auto-scan rebuilds the complete station index for your region.
Radio cutting out mid-station at low battery
The DAB decoder in the Avalon N5 and Evoke D4 requires a stable voltage to process the OFDM stream continuously. When battery voltage sags below roughly 3.2V under load, the decoder loses sync and the radio cuts audio or reboots. This happens faster on multiplexes with high bit-rate stations because the tuner draws more current. A battery with degraded cells hits that sag point earlier in the discharge curve than a fresh one does.
Saved stations gone after fitting a new battery
Pure DAB radios store the station list in volatile RAM that loses its contents the moment main power is removed. Fitting a replacement battery is a full power interruption, so the list clears every time. This is not a fault with the new battery or the radio. Go to Menu → Settings → Auto-tune and let the radio complete a full scan — it will repopulate every receivable station and restore your presets.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Pure
- Manufacturer: CS
- Series: Standard
- Color: Black
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My Pure Evoke D4 reception is noticeably worse after I swapped the battery — what's going on?
The DAB tuner needs the battery voltage above approximately 3.5V to sustain full RF output power. A new battery that has been sitting in storage for months may ship in a partially discharged state and won't hit that voltage until after its first full charge cycle. Charge the battery completely before use, then retest reception. If signal strength is still weak, run an auto-scan so the radio recalculates the signal table for your local transmitters.
The radio charges fine but battery life feels much shorter near a window or in a room with weak DAB signal — is the battery faulty?
This is normal behaviour, not a fault. When the Pure Avalon N5 or Evoke D4 receives a weak DAB multiplex, the tuner increases its search and acquisition power draw to maintain lock on the signal. That higher current draw depletes the battery faster than it would under strong-signal conditions. Move the radio closer to a window or use a passive DAB antenna with a coaxial input — reducing the tuner's effort is the most direct way to extend a charge cycle in a weak-signal location.
After charging overnight, the Pure DAB radio still shows a low battery warning within minutes of being switched on — what should I check first?
If the original battery is still installed and has gone through many charge cycles, its actual capacity may have fallen well below its rated figure — enough that it reads "full" but drains almost immediately. Remove the original battery and check the terminal voltage with a multimeter; a healthy cell at full charge reads 4.1–4.2V. Anything below 3.8V after a full charge confirms the cell has degraded and the battery needs replacing with a fresh F1-compatible unit like this one.
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